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经营范围
发明名称
PERCUSSIVE DEVICE
摘要
申请公布号
SU848556(A1)
申请公布日期
1981.07.23
申请号
SU19711716622
申请日期
1971.11.22
申请人
VNII BUROVOJ TEKHNIKI
发明人
NAZAROV VIKTOR I,SU
分类号
E21B4/14;(IPC1-7):E21B4/14
主分类号
E21B4/14
代理机构
代理人
主权项
地址
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