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发明名称
DRILLING BIT
摘要
申请公布号
SU588335(A1)
申请公布日期
1978.01.15
申请号
SU19742034522
申请日期
1974.06.17
申请人
VNII METODIKI TEKHNIKI RAZVEDKI VITR
发明人
BYCHENKOV EVGENIJ ,SU;BABUSHKIN BORIS D,SU
分类号
(IPC1-7):E21B9/36
主分类号
(IPC1-7):E21B9/36
代理机构
代理人
主权项
地址
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