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经营范围
发明名称
Adapter for well casing
摘要
申请公布号
US2793699(A)
申请公布日期
1957.05.28
申请号
US19560577538
申请日期
1956.04.11
申请人
TUBBS HOWARD A
发明人
TUBBS HOWARD A.
分类号
E02D19/10;E03B5/06
主分类号
E02D19/10
代理机构
代理人
主权项
地址
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