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发明名称
ROTARY-PERCUSSIVE DEVICE
摘要
申请公布号
SU1509523(A2)
申请公布日期
1989.09.23
申请号
SU19874295377
申请日期
1987.08.10
申请人
INST GORNOGO DELA SO AN SSSR
发明人
PROKOPENKO ANATOLIJ I,SU;RYASHENTSEV ALEKSANDR N,SU
分类号
E21B6/02
主分类号
E21B6/02
代理机构
代理人
主权项
地址
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