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发明名称
PNEUMATIC DRILL CONSTRUCTION
摘要
申请公布号
CA574899(A)
申请公布日期
1959.04.28
申请号
CAD574899
申请日期
申请人
THE ARO EQUIPMENT CORPORATION
发明人
WILLIAM B. DE GROFF
分类号
主分类号
代理机构
代理人
主权项
地址
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