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发明名称
METHOD AND APPARATUS FOR ROTARY-PERCUSSIVE DRILLING
摘要
申请公布号
SU1105596(A1)
申请公布日期
1984.07.30
申请号
SU19833578429
申请日期
1983.04.15
申请人
INST GORNOGO DELA SEVERO-YAKUTSKOGO FILIALA SO AN SSSR
发明人
ARTSIMOVICH GERMAN V,SU;FEDOROV LAZAR N,SU
分类号
E21B7/00;E21B4/14;E21B6/00;(IPC1-7):E21B7/00
主分类号
E21B7/00
代理机构
代理人
主权项
地址
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