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发明名称
ROCK DRILL
摘要
申请公布号
JPH06317083(A)
申请公布日期
1994.11.15
申请号
JP19930132771
申请日期
1993.05.10
申请人
YAMAMOTO TEKKOSHO:KK
发明人
IWASAKI TSUNEO;HAGA KAZUO
分类号
B25D9/12;E21B1/00;E21B1/26;E21B7/00;(IPC1-7):E21C3/20
主分类号
B25D9/12
代理机构
代理人
主权项
地址
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