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发明名称
CORE BREAKER
摘要
申请公布号
SU688601(A1)
申请公布日期
1979.09.30
申请号
SU19772566662
申请日期
1977.09.26
申请人
VNII BUROVOJ TEKHNIKI
发明人
PAVLOV NIKOLAJ G,SU;EDELMAN YAKOV A,SU
分类号
E21B25/00;(IPC1-7):E21B25/00
主分类号
E21B25/00
代理机构
代理人
主权项
地址
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