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经营范围
发明名称
Pipe tallier
摘要
申请公布号
US3134175(A)
申请公布日期
1964.05.26
申请号
US19600074929
申请日期
1960.12.09
申请人
POTTS RAY H
发明人
POTTS RAY H.
分类号
E21B47/04
主分类号
E21B47/04
代理机构
代理人
主权项
地址
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