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经营范围
发明名称
Cementing wells
摘要
申请公布号
US2316402(A)
申请公布日期
1943.04.13
申请号
US19400353273
申请日期
1940.08.19
申请人
CANON ARTHUR B
发明人
CANON ARTHUR B.
分类号
E21B33/134
主分类号
E21B33/134
代理机构
代理人
主权项
地址
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