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发明名称
Means for stopping flow of fluid in conduits
摘要
申请公布号
US2272734(A)
申请公布日期
1942.02.10
申请号
US19400341661
申请日期
1940.06.21
申请人
WITT IRWIN H
发明人
WITT IRWIN H.
分类号
F16L55/124
主分类号
F16L55/124
代理机构
代理人
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