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经营范围
发明名称
ROCK DRILL
摘要
申请公布号
JPH0579271(A)
申请公布日期
1993.03.30
申请号
JP19910266931
申请日期
1991.09.19
申请人
SAN GIKEN KK
发明人
KOZASA NOBORU;WATABE KAZUTAKA
分类号
B25D17/11;E21B7/02;E21B15/00;E21B19/08;E21B21/00
主分类号
B25D17/11
代理机构
代理人
主权项
地址
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