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发明名称
PIPE STRAIGHTENER
摘要
申请公布号
CA831323(A)
申请公布日期
1970.01.06
申请号
CAD831323
申请日期
申请人
HYCALOG (CANADA) LTD.
发明人
WALTER A. JOHNSON
分类号
主分类号
代理机构
代理人
主权项
地址
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