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发明名称
摘要
申请公布号
FR2399305(B1)
申请公布日期
1980.03.07
申请号
FR19770024100
申请日期
1977.08.04
申请人
INSTITUT GORNOGO DELA SIBIRSKOGO
发明人
分类号
B25D9/18;E02F5/16;E21B4/14;(IPC1-7):B25D9/04;E02D7/00;E02D17/14
主分类号
B25D9/18
代理机构
代理人
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地址
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