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发明名称
DRILLING APPARATUS
摘要
申请公布号
CA416929(A)
申请公布日期
1943.12.07
申请号
CAD416929
申请日期
申请人
MUELLER
发明人
WALTER J. BOWAN;FRANK H. MUELLER
分类号
主分类号
代理机构
代理人
主权项
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