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发明名称
PERFORATOR TAIL PIECE
摘要
申请公布号
SU594315(A1)
申请公布日期
1978.02.25
申请号
SU19762364589
申请日期
1976.05.21
申请人
NI GORNORUDNYJ INSTITUT
发明人
KOVALSKIJ VIKTOR D,SU
分类号
(IPC1-7):E21C15/02
主分类号
(IPC1-7):E21C15/02
代理机构
代理人
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地址
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