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发明名称
Backflow prevention device
摘要
申请公布号
US3173439(A)
申请公布日期
1965.03.16
申请号
US19610119553
申请日期
1961.06.26
申请人
GRISWOLD DONALD G;CHARD MILES M;WYCKOFF FRED K;GRAU WILLIAM S
发明人
GRISWOLD DONALD G.;CHARD MILES M.;WYCKOFF FRED K.;GRAU WILLIAM S.
分类号
E03B7/07;E03C1/10;F16K15/00;F16K17/34;F16K31/365
主分类号
E03B7/07
代理机构
代理人
主权项
地址
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