ClassID:

142372

F03D1/001 - CPC Classification

Classification description:

Recent Application in this class:
#1
20180155160
2018-06-07

Crane system and an associated method thereof

#2
20180106237
2018-04-19

Attachment methods for surface features of wind turbine rotor blades

#3
20180051672
2018-02-22

JOINTED ROTOR BLADE FOR WIND TURBINE

#4
20180030962
2018-02-01

OFFSHORE DEPLOYABLE FLOATING WIND TURBINE SYSTEM AND METHOD

#5
20180030961
2018-02-01

OFFSHORE DEPLOYABLE WIND TURBINE SYSTEM AND METHOD WITH A GRAVITY BASE

#6
20170284362
2017-10-05

Reducing the load of a wind turbine rotor blade during installation

#7
20170268479
2017-09-21

Thermoset component having a weldable thermoplastic interface

#8
20170248117
2017-08-31

Mounting method and template for vortex generator

#9
20170248116
2017-08-31

Vortex generator for wind turbine blade, wind turbine blade, wind turbine power generating apparatus, and method of mounting vortex generator

#10
20170218915
2017-08-03

Lifting Device for a Wind Turbine Rotor Blade

#11
20170145990
2017-05-25

Wind turbine noise reduction with acoustically absorbent serrations

#12
20170145986
2017-05-25

CUSTOM FIT BLADE TIP FOR A ROTOR BLADE ASSEMBLY OF A WIND TURBINE AND METHOD OF FABRICATION

#13
20170114772
2017-04-27

System and method for manufacturing wind turbine rotor blades for simplified installation and removal

#14
20170107085
2017-04-20

Tool for handling a long and heavy object

#15
20170082089
2017-03-23

Wind turbine rotor blade components formed from pultruded hybrid-resin fiber-reinforced composites

#16
20170082087
2017-03-23

Method for manufacturing blade components using pre-cured laminate materials

#17
20170081465
2017-03-23

Cycloaliphatic carbonates as reactive diluents in epoxy resins

#18
20170074238
2017-03-16

Rotor blades having thermoplastic components and methods for joining rotor blade components

#19
20170074237
2017-03-16

Methods for joining surface features to wind turbine rotor blades

#20
20170074236
2017-03-16

Systems and methods for joining blade components of rotor blades

#21
20170067437
2017-03-09

Method for re-indexing a pitch bearing of a wind turbine

#22
20170058867
2017-03-02

Pultruded components for a shear web of a wind turbine rotor blade

#23
20170058866
2017-03-02

THERMOPLASTIC PULTRUDED STIFFENERS FOR LOCALLY REINFORCING A WIND TURBINE ROTOR BLADE

#24
20170058865
2017-03-02

Modular wind turbine rotor blade constructed of multiple resin systems

#25
20170058863
2017-03-02

Erosion resistant leading edge cap for a wind turbine rotor blade

#26
20170058861
2017-03-02

Rotor blade components having varying fiber density regions

#27
20170051719
2017-02-23

WIND TURBINE BLADE WITH TRIPPING DEVICE AND METHOD THEREOF

#28
20170045030
2017-02-16

Method and arrangement for removing and lifting a blade pitch slewing ring bearing of a wind turbine

#29
20170045029
2017-02-16

Method and system for de-erection and re-erection of a blade of a wind turbine

#30
20170016426
2017-01-19

Method for attaching a toothed rear edge to a blade rear edge of a rotor blade

#31
20160377051
2016-12-29

Structural component for a modular rotor blade

#32
20160377048
2016-12-29

Modular wind turbine rotor blades and methods of assembling same

#33
20160376807
2016-12-29

System and method for assembling tower sections of a wind turbine lattice tower structure

#34
20160369778
2016-12-22

METHOD OF ASSEMBLING A WIND TURBINE

#35
20160369771
2016-12-22

Wind turbine blade modules and wind turbine blades

#36
20160369522
2016-12-22

Connection between lattice tower and nacelle

#37
20160340000
2016-11-24

Method of assembling a floating wind turbine platform

#38
20160327021
2016-11-10

Attachment method and system to install components, such as vortex generators, to a wind turbine blade

#39
20160327019
2016-11-10

Attachment method to install components, such as tip extensions and winglets, to a wind turbine blade, as well as the wind turbine blade and component

#40
20160327017
2016-11-10

System and method for replacing a pitch bearing

#41
20160327016
2016-11-10

Method for suspending a rotor blade from a hub of a wind turbine

#42
20160319800
2016-11-03

STRAIN ISOLATED ATTACHMENT FOR ONE-PIECE WIND TURBINE ROTOR HUB

#43
20160312766
2016-10-27

PITCH ACTUATOR ARRANGEMENT AND METHOD OF INSTALLING A PITCH ACTUATOR ARRANGEMENT

#44
20160305147
2016-10-20

WIND TOWER ERECTION SYSTEM

#45
20160290322
2016-10-06

Heating installation arrangement

#46
20160281680
2016-09-29

Modular wind turbine rotor blade

#47
20160279867
2016-09-29

Joining method for wind turbine blade shells

#48
20160273516
2016-09-22

Reinforcing strip for a wind turbine blade

#49
20160258414
2016-09-08

Wind turbine rotor blade and a method for mounting a wind turbine rotor blade

#50
20160237985
2016-08-18

Device and Method for Handling, Mounting or Dismantling Components of a Wind Turbine

#51
20160230746
2016-08-11

Floating wind turbine support system

#52
20160222941
2016-08-04

Vortex generator for a rotor blade

#53
20160215762
2016-07-28

RETROFITTED WIND TURBINE INSTALLATION

#54
20160215754
2016-07-28

Load-handling means for a tower or a tower section of a wind turbine and method for erecting a wind turbine

#55
20160201645
2016-07-14

Wind turbine, a wind turbine blade, and a method of reinforcing a wind turbine blade

#56
20160195067
2016-07-07

Wind turbine tower with an elevator system

#57
20160195064
2016-07-07

METHOD FOR PRODUCING A COMPOSITE STRUCTURAL PART, COMPOSITE STRUCTURAL PART AND WIND POWER PLANT

#58
20160194109
2016-07-07

Turning stand for a rotor hub of a wind turbine and method for turning the rotor hub

#59
20160177926
2016-06-23

System and method for securing a conductive cable within a wind turbine rotor blade

#60
20160177917
2016-06-23

Wind turbine rotor blades with load-transferring exterior panels

#61
20160177916
2016-06-23

Blade for a wind turbine and a method for manufacturing a blade for a wind turbine

#62
20160169195
2016-06-16

Spar cap for a wind turbine rotor blade

#63
20160169192
2016-06-16

Wind turbine with a concrete tower and method for the assembly thereof

#64
20160169191
2016-06-16

Tool assembly and method for lifting wind turbine parts

#65
20160169190
2016-06-16

ROTOR BLADE SURFACE FEATURE INSTALLATION SYSTEMS AND METHODS

#66
20160160837
2016-06-09

PULTRUDED ROTOR BLADE COMPONENTS HAVING INTERLOCKING EDGES

#67
20160160836
2016-06-09

Apparatus and method of using a disconnectable floating spar buoy jacket wind turbine

#68
20160160499
2016-06-09

Strake for a wind turbine tower

#69
20160153429
2016-06-02

BUILDINGS WITH WIND-ENERGY-CONVERSION SYSTEMS

#70
20160153423
2016-06-02

System for centering wye ring in-situ

#71
20160146183
2016-05-26

System for servicing wind turbine rotor

#72
20160146182
2016-05-26

Wind turbine elevator for hoisting a nacelle along a tower and pivoting the nacelle at a top of the tower

#73
20160138562
2016-05-19

Assembly with handling unit for moving a wind turbine component, such as a wind turbine hub, from a transportation position to a wind turbine assembly position in or on the nacelle, the main shaft or the hub

#74
20160138561
2016-05-19

Method for mounting a wind turbine rotor blade, and wind turbine rotor blade

#75
20160131110
2016-05-12

Conduit assembly for a lightning protection cable of a wind turbine rotor blade

#76
20160131105
2016-05-12

ASSEMBLY STAND FOR ASSEMBLING A GEARBOX UNIT AND A MAIN SHAFT OF WIND TURBINE

#77
20160130832
2016-05-12

Method and apparatus for erecting tower with hydraulic cylinders

#78
20160115939
2016-04-28

System and method for controlling bonding material in a wind turbine blade

#79
20160108896
2016-04-21

Wind turbine tower section, a wind turbine having such tower section and method for forming such tower section

#80
20160108893
2016-04-21

Portable Multiple Source Electrical Power Unit

#81
20160102652
2016-04-14

Strain isolated attachment for one-piece wind turbine rotor hub

#82
20160090962
2016-03-31

Counterweight systems for a wind turbine and methods

#83
20160090961
2016-03-31

Installing blades in a wind turbine and wind turbine lifting systems

#84
20160084221
2016-03-24

Arrangement to align a part of a wind turbine

#85
20160084220
2016-03-24

Arrangement to align a part of a wind turbine

#86
20160069321
2016-03-10

System and method for removing and/or installing a rotor blade of a wind turbine

#87
20160069099
2016-03-10

Method and device for erecting a tower for a wind energy plant

#88
20160053741
2016-02-25

Wind turbine blade root and process for manufacturing a wind turbine blade root

#89
20160047356
2016-02-18

ROTOR BLADE OF A WIND TURBINE

#90
20160040649
2016-02-11

Wind turbine blade lowering apparatus

#91
20160025074
2016-01-28

Floating offshore wind power generation facility

#92
20160025064
2016-01-28

Method for maintaining floating-body type wind turbine power generating apparatus

#93
20160010623
2016-01-14

Modular wing-shaped tower self-erection for increased wind turbine hub height

#94
20160010622
2016-01-14

Method and device for blade replacement in wind turbines

#95
20160010621
2016-01-14

Tall wind turbine tower erection with climbing crane

#96
20160010356
2016-01-14

Tower erecting system

#97
20160003216
2016-01-07

System for assembling and/or disassembling a wind turbine electric generator

#98
20150377218
2015-12-31

ROTATING UNIT FOR ROTATING A COMPONENT MOUNTED IN A ROTATBLE MANNER ON A WIND TURBINE

#99
20150369212
2015-12-24

Efficient wind turbine blades, wind turbine blade structures, and associated systems and methods of manufacture, assembly and use

#100
20150369211
2015-12-24

WIND BLADE TIP JOINT

#101
20150368075
2015-12-24

Device and method for placing a rotor blade of a wind turbine

#102
20150367918
2015-12-24

Floating wind turbine platform with ballast control and water entrapment plate systems

#103
20150361963
2015-12-17

Transportation of a direct drive generator

#104
20150361958
2015-12-17

METHOD FOR REDUCING NOISE, VIBRATIONS, AND PRESSURE PULSATIONS ASSOCIATED WITH AERODYNAMIC INTERACTIONS BETWEEN WIND TURBINE BLADE WAKES AND THE WIND TURBINE TOWER

#105
20150361950
2015-12-17

Fixation for a wind turbine blade to the hub

#106
20150354540
2015-12-10

ROOT BUSHING FOR A BLADE ROOT OF A WIND TURBINE ROTOR BLADE, A BLADE ROOT, A WIND TURBINE ROTOR BLADE, A WIND TURBINE AND A METHOD FOR MANUFACTURING A ROOT BUSHING

#107
20150354530
2015-12-10

MULTIPLE AIRFOIL WIND TURBINE BLADE ASSEMBLY

#108
20150345465
2015-12-03

Wind turbine blade lifting device and a method for lifting a wind turbine blade

#109
20150345463
2015-12-03

Wind turbine tower guide system, and a method for installing an installation unit

#110
20150337798
2015-11-26

Device and method for placing components of a structure

#111
20150337797
2015-11-26

Rotor blade for a wind turbine

#112
20150322917
2015-11-12

Customizing a wind turbine for site-specific conditions

#113
20150322916
2015-11-12

SOILING SHIELD FOR WIND TURBINE BLADE

#114
20150316028
2015-11-05

Wind turbine rotor blade and method of construction

#115
20150316027
2015-11-05

Wind turbine blades and method of manufacturing the same

#116
20150316023
2015-11-05

Turbine blade shear web alignment

#117
20150314537
2015-11-05

Method of manufacturing an aerodynamic shell part for a wind turbine blade

#118
20150308404
2015-10-29

A WIND TURBINE BLADE COMPRISING AN AERODYNAMIC BLADE SHELL WITH RECESS AND PRE-MANUFACTURED SPAR CAP

#119
20150308402
2015-10-29

System and method of manufacturing a wind turbine blade

#120
20150300317
2015-10-22

Wind turbine

#121
20150300313
2015-10-22

Apparatus for moving blades of a wing turbine and wind turbine including the same

#122
20150300037
2015-10-22

LIFTING SYSTEM FOR WIND TURBINE TOWERS AND METHOD FOR ERECTING A WIND TURBINE TOWER

#123
20150298943
2015-10-22

Lifting device for assembly and disassembly of wind turbine components

#124
20150292487
2015-10-15

Wind turbine rotor blade having a lightning receptor base and method for making the same

#125
20150292477
2015-10-15

Segmented rotor blade with a bolt connection

#126
20150292475
2015-10-15

METHOD FOR PRODUCING A ROTOR BLADE

#127
20150292175
2015-10-15

Working platform for an offshore wind energy plant and method for manufacturing the same

#128
20150285225
2015-10-08

Method and device for aligning tower sections

#129
20150275855
2015-10-01

Trailing edge cap for a rotor blade and method of manufacturing same

#130
20150275854
2015-10-01

Counterweighting a wind turbine hub

#131
20150275853
2015-10-01

Counterweighting a wind turbine hub

#132
20150275852
2015-10-01

ATTACHING JIG FOR AIRFLOW GENERATION DEVICE AND ATTACHING METHOD OF AIRFLOW GENERATION DEVICE

#133
20150275851
2015-10-01

Installing a blade in a wind turbine and wind turbines

#134
20150275850
2015-10-01

Floating-body type wind turbine power generating apparatus and method of transporting components of the same

#135
20150267681
2015-09-24

Wind turbine having external gluing flanges near flat back panel

#136
20150252582
2015-09-10

Slipformed concrete tower

#137
20150240512
2015-08-27

Wind tower erection system

#138
20150233341
2015-08-20

Methods and systems for removing and/or installing wind turbine rotor blades

#139
20150232304
2015-08-20

Lifter and method for handling a rotor blade, rotor blade for a wind generator and method for marking a rotor blade, system comprising a lifter and a rotor blade

#140
20150226179
2015-08-13

Method and system for replacing a single wind turbine blade

#141
20150226178
2015-08-13

Manufacture of wind turbine blades

#142
20150219076
2015-08-06

WIND TURBINE ROTOR SHAFT ARRANGEMENT WITH EXPANDING ATTACHMENT PORTION

#143
20150219070
2015-08-06

Wind turbine blade and methods for transporting, storing and installing wind turbine blades

#144
20150219067
2015-08-06

Device and method for assembling a structure

#145
20150198142
2015-07-16

SEGMENTED ROTOR HUB

#146
20150198141
2015-07-16

Wind turbine blade

#147
20150192103
2015-07-09

Installation and erection assembly for an elongated structure

#148
20150167642
2015-06-18

Wind turbine blade lightning bypass system

#149
20150167632
2015-06-18

Rotor assembly for a wind turbine and method for mounting a blade to the rotor assembly

#150
20150159802
2015-06-11

Portable modular monopole tower foundation

#151
20150152839
2015-06-04

Spar assembly for a wind turbine rotor blade

#152
20150135534
2015-05-21

SYSTEM AND METHOD FOR UPTOWER MACHINING OF A WIND TURBINE

#153
20150132119
2015-05-14

Method and means for establishing access to the main parts in the nacelle on a wind turbine

#154
20150108764
2015-04-23

Single piece electric assembly for connecting an off-shore wind turbine with an electric subsea cable, wind turbine, wind turbine cluster and method for mounting such an electric assembly to a wind turbine tower

#155
20150102605
2015-04-16

GENERATOR FOR A GEARLESS WIND POWER INSTALLATION

#156
20150093250
2015-04-02

ROOT STIFFENER ASSEMBLY FOR A WIND TURBINE ROTOR BLADE

#157
20150071790
2015-03-12

Articulated slewing jib crane and wind turbine incorporating same

#158
20150064017
2015-03-05

Rotor blade for a wind power plant

#159
20150064014
2015-03-05

Method for installing a shear web insert within a segmented rotor blade assembly

#160
20150052836
2015-02-26

Cruciform tower

#161
20150047192
2015-02-19

METHOD TO INSTALL A ROTOR BLADE

#162
20150028610
2015-01-29

Blade gripping device

#163
20150016976
2015-01-15

Wind turbine nacelle

#164
20150016939
2015-01-15

Raising device configured to be connected to a tower segment

#165
20150003994
2015-01-01

Wind turbine blade and method of fabricating the same

#166
20150003991
2015-01-01

MODULAR EXTENSIONS FOR WIND TURBINE ROTOR BLADES

#167
20140374679
2014-12-25

CABLE INSTALLATION APPARATUS FOR MOUNTING ON A FLANGED STRUCTURE

#168
20140373353
2014-12-25

Assembly method for a main rotor shaft and an installation tool thereto

#169
20140366792
2014-12-18

Mobile barge and method of operation of mobile barge

#170
20140356184
2014-12-04

Wind turbine flange connection

#171
20140350724
2014-11-27

Bolt tightening robot for wind turbines

#172
20140341742
2014-11-20

Method and device for mounting a rotor hub on a wind turbine

#173
20140334938
2014-11-13

Airflow modifying assembly for a rotor blade of a wind turbine

#174
20140334930
2014-11-13

Wind turbine blade assembled from inboard part and outboard part having different types of load carrying structures

#175
20140334908
2014-11-13

Tool and a method for moving a wind turbine drivetrain component

#176
20140328692
2014-11-06

Attachment system and method for wind turbine vortex generators

#177
20140319091
2014-10-30

Erecting a wind powerplant

#178
20140318055
2014-10-30

Support structure for a wind turbine and procedure to erect the support structure

#179
20140317927
2014-10-30

Method for assembling and transporting an offshore wind turbine

#180
20140310958
2014-10-23

Assembly Method of Wind Power Generation System

#181
20140301855
2014-10-09

Blade insert for a wind turbine rotor blade

#182
20140300112
2014-10-09

Offshore wind power generator, lifting jig for transferring the offshore wind power generator, and method and system for installing the offshore wind power generator using the lifting jig

#183
20140294592
2014-10-02

Acoustic shield for noise reduction in wind turbines

#184
20140271198
2014-09-18

Wind turbine blades with layered, multi-component spars, and associated systems and methods

#185
20140260849
2014-09-18

Tool and method for scarfing a rotor blade segment

#186
20140259669
2014-09-18

System and method for installing a blade insert between separate portions of a wind turbine rotor blade

#187
20140255190
2014-09-11

Wind Turbine System Constructive Arrangement

#188
20140237932
2014-08-28

Tower assembly system for wind turbines and method thereof

#189
20140234116
2014-08-21

DEVICE FOR CONNECTING WING SECTIONS AND METHOD FOR ASSEMBLING SUCH SECTIONS

#190
20140234105
2014-08-21

Floating wind turbine

#191
20140230223
2014-08-21

Tower part for a wind turbine, an aperture cover system, a method for manufacturing a tower part and uses hereof

#192
20140227101
2014-08-14

Wind turbine blade with noise reduction devices and related method

#193
20140219812
2014-08-07

Apparatus for accessing the nacelle of a wind turbine and associated methods

#194
20140219804
2014-08-07

Hub for a wind turbine

#195
20140196654
2014-07-17

Floating wind turbine platform with ballast control and mooring system

#196
20140186185
2014-07-03

WIND TURBINE BLADE MOUNTING SYSTEM

#197
20140175038
2014-06-26

Wind turbine assembly system

#198
20140173898
2014-06-26

Method of mounting a wind turbine

#199
20140169978
2014-06-19

ROTOR BLADE ASSEMBLIES AND METHODS FOR ASSEMBLING THE SAME

#200
20140154091
2014-06-05

Efficient wind turbine blades, wind turbine blade structures, and associated systems and methods of manufacture, assembly and use

#201
20140154090
2014-06-05

Wind blades with mechanical elements for pretensioning in tension fabrics

#202
20140150227
2014-06-05

Lifting device for connecting two rotor blade segments of a wind turbine

#203
20140140856
2014-05-22

Wind turbine blade comprising vortex generators

#204
20140119935
2014-05-01

Method and adhesive machine for constructing segmented rotor blades

#205
20140109407
2014-04-24

Method and system for replacing a single wind turbine blade

#206
20140103664
2014-04-17

Offshore wind turbine

#207
20140102039
2014-04-17

Method of setting up, maintaining and disassembling a wind turbine

#208
20140084592
2014-03-27

Wind-driven machine for generating power

#209
20140072430
2014-03-13

Wind turbine rotor and method of mounting

#210
20140064856
2014-03-06

Method of installing an offshore wind turbine and a transport vessel thereof

#211
20140042763
2014-02-13

Tower erection lift kit tools

#212
20140030095
2014-01-30

Wind turbine blade with elongated fastening members in the root region thereof

#213
20140028138
2014-01-30

Method for assembling a segmented electrical machine while maintaining gaps between segments

#214
20140027400
2014-01-30

Device for mounting of wind turbine blades

#215
20140021816
2014-01-23

Wind turbine generator and maintenance of its main bearing

#216
20140017047
2014-01-16

Transportation of drive train components in a wind turbine nacelle

#217
20140015255
2014-01-16

Wind turbine installation and advance double counter-rotating blades, 90° drive assembly with lower generator mounting system

#218
20140010658
2014-01-09

Method for craneless wind turbine blade handling via a turbine hub

#219
20130334819
2013-12-19

Components of a wind power plant

#220
20130328309
2013-12-12

MATRIX CONVERTER APPARATUS FOR WIND-POWER GENERATION, METHOD FOR CONTROLLING MATRIX CONVERTER, WIND-POWER GENERATOR APPARATUS, WIND FARM, AND METHOD FOR MANUFACTURING WIND TURBINE

#221
20130323007
2013-12-05

Facilitated handling of wind turbine blades

#222
20130318789
2013-12-05

System and method for assembling and disassembling components from a wind power turbine

#223
20130315740
2013-11-28

Method and equipment for turning a blade or a blade part for a wind turbine during production or installation

#224
20130312241
2013-11-28

Aligning tool in the field of wind turbines for aligning a hole with a fastener

#225
20130300125
2013-11-14

Wind turbine power transmission system and method of installing a wind farm including same

#226
20130270837
2013-10-17

Wind turbine power transmission system

#227
20130269286
2013-10-17

Tower of a wind power plant and method for producing a tower of a wind power plant

#228
20130269188
2013-10-17

Installation/dismounting of a hub to/from a nacelle of a wind turbine by using a blade pitch angle adjustment device of the hub for orientating the hub

#229
20130259677
2013-10-03

Structure for nacelle cover connection portion of wind turbine generator

#230
20130243569
2013-09-19

Nacelle for a wind turbine

#231
20130243559
2013-09-19

Windmill conveyance system and method for using same

#232
20130236324
2013-09-12

Wind turbine blade structures, lifting assemblies and methods of blade handling

#233
20130236316
2013-09-12

Apparatus for and method of mounting wind turbine blades on a wind turbine tower

#234
20130236304
2013-09-12

Nacelle stand and a method for assembling and testing a nacelle for a wind turbine

#235
20130209263
2013-08-15

Blade for a wind turbine

#236
20130209257
2013-08-15

Blade for a wind turbine

#237
20130205711
2013-08-15

Assembly rig for assembling a wind turbine tower or wind turbine tower sections and a respective method

#238
20130193691
2013-08-01

IMPROVEMENTS TO A WIND TURBINE ASSEMBLY

#239
20130186013
2013-07-25

Tower erecting system

#240
20130183158
2013-07-18

Anti-ovalization tool for introduction into a wind turbine blade root and method of reducing ovalization of a wind turbine blade root

#241
20130175814
2013-07-11

Method for moving a wind turbine component, such as a wind turbine hub, from a transportation position to a wind turbine assembly position in or on the nacelle, the main shaft or the hub, a handling unit, a wind turbine hub and use hereof

#242
20130164144
2013-06-27

Bulkhead of a wind turbine

#243
20130164134
2013-06-27

Limited Yaw Wind Turbine

#244
20130156560
2013-06-20

Wind turbine nacelle cover and a method for installing a generator on a mainframe in a nacelle

#245
20130152840
2013-06-20

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Anti-oscillation apparatus and technique for securing wind turbine blades against oscillations

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Service crane for a wind turbine

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Continuous-flow power installation

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Butt welding joint using high-energy density beam

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Method, system and device for contributing to the assembly of a wind turbine

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Manipulator for the assembly of rotor blades of a wind power installation

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Method of handling wind turbine blades and device for mounting wind turbine blades, in particular mounting blades on a wind turbine

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