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发明名称
METHOD OF PERCUSSIVE DRILLING WITH SIMULTANEOUS CASING-IN
摘要
申请公布号
SU1481370(A1)
申请公布日期
1989.05.23
申请号
SU19864061732
申请日期
1986.02.13
申请人
MO GEOLOGORAZVEDOCHNYJ I IM.SERGO ORDZHONIKIDZE
发明人
ARSENTEV YURIJ A,SU;LUKINSKIJ GARRISON I,SU;POLEZHAEVA ANNA P,SU
分类号
E21B7/20;E21B1/00
主分类号
E21B7/20
代理机构
代理人
主权项
地址
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