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Classification
E21D
E21D21/00
E21D21/0026
E21D2021/0053
ClassID:
136179
⎘
E21D2021/0053 - CPC Classification
Classification description:
Recent Application in this class:
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#1
20150117962
2015-04-30
RESIN SYSTEM AND ROCK ANCHOR
#2
20100202838
2010-08-12
Rock bolt
#3
20090074516
2009-03-19
Self drilling rock bolt
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