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经营范围
发明名称
ROCK DRILLING UNIT
摘要
申请公布号
JPH05295978(A)
申请公布日期
1993.11.09
申请号
JP19920125486
申请日期
1992.04.20
申请人
SAN GIKEN KK
发明人
WATABE KAZUTAKA;KOZASA NOBORU
分类号
B25D17/11;E21B7/02;E21B15/00;E21B19/08;(IPC1-7):E21C11/00
主分类号
B25D17/11
代理机构
代理人
主权项
地址
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