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发明名称
ROTARY DRILLING TOOL
摘要
申请公布号
CA374331(A)
申请公布日期
1938.06.07
申请号
CAD374331
申请日期
申请人
JOHN ADOLPHUS ZUBLIN
发明人
JOHN ADOLPHUS ZUBLIN
分类号
主分类号
代理机构
代理人
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地址
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