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发明名称
PERCUSSIVE UNIT FOR EARTH DRILLING
摘要
申请公布号
CA812552(A)
申请公布日期
1969.05.13
申请号
CAD812552
申请日期
申请人
ATLANTIC RICHFIELD COMPANY
发明人
JAMES M. CLEARY
分类号
主分类号
代理机构
代理人
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