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发明名称
CEMENTING COLLAR
摘要
申请公布号
CA877751(A)
申请公布日期
1971.08.10
申请号
CAD877751
申请日期
申请人
G.W. MURPHY INDUSTRIES
发明人
WAYNE F. NELSON
分类号
主分类号
代理机构
代理人
主权项
地址
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