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发明名称
DRILLING AND BORING APPARATUS AND METHODS
摘要
申请公布号
CA507268(A)
申请公布日期
1954.11.09
申请号
CAD507268
申请日期
申请人
WALES-STRIPPIT CORPORATION
发明人
GEORGE F. WALES
分类号
主分类号
代理机构
代理人
主权项
地址
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