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发明名称
PERCUSSIVE-ACTION DEVICE
摘要
申请公布号
SU621868(A1)
申请公布日期
1978.08.30
申请号
SU19772465319
申请日期
1977.03.21
申请人
NI PK I PO DOBYCHE POLEZNY ISKOPAEMYKH OTKRYTYM SPOSOBOM
发明人
KORYAKIN ANATOLIJ IVANOVICH,SU;PEREKSIN NIKOLAJ VASILEVICH,SU;PLOTNIKOV VLADIMIR ANISIMOVICH,SU
分类号
E21C37/00;E01C19/05;E21C37/14;(IPC1-7):E21C3/18
主分类号
E21C37/00
代理机构
代理人
主权项
地址
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