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发明名称
HYDRAULIC ROCK DRILL
摘要
申请公布号
US3470970(A)
申请公布日期
1969.10.07
申请号
USD3470970
申请日期
1967.11.24
申请人
CANADA IRON FOUNDRY LTD.
发明人
RAYMOND MARCEL MAHY;WILLIAM J. TYLER
分类号
B25D9/12;E21B1/26;(IPC1-7):E21C3/04;B25D9/04;B25D9/06
主分类号
B25D9/12
代理机构
代理人
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