135894 ⎘
Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole Devices with pistons, plungers, or the like, pressed locally against the wall of the borehole
Hydraulically operated splitting device
Cartridge for tunnel blasting
DEVICE FOR BREAKING SOLID MATERIAL AND METHOD OF MANUFACTURING A HOSE ELEMENT FOR SUCH A DEVICE