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发明名称
Plumbing device
摘要
申请公布号
US2804690(A)
申请公布日期
1957.09.03
申请号
US19540416180
申请日期
1954.03.15
申请人
BEN C. GERWICK, INC.;PETER KIEWIT SONS' CO.
发明人
TALBOT WILLIAM J.;DARBY JOHN B.;COLLINS THOMAS F.
分类号
E02D15/08;E02D23/08
主分类号
E02D15/08
代理机构
代理人
主权项
地址
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