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发明名称
ROCK DRILL
摘要
申请公布号
JPH1150776(A)
申请公布日期
1999.02.23
申请号
JP19970206226
申请日期
1997.07.31
申请人
MATSUDA ASTEC KK
发明人
SHIBUKAWA TAKAO;TAKEHARA YOSHITAKA
分类号
E21B21/00;E21B7/02;E21B15/00;E21B19/08;(IPC1-7):E21C11/00;E21C7/00
主分类号
E21B21/00
代理机构
代理人
主权项
地址
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