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发明名称
Valve
摘要
申请公布号
US2274876(A)
申请公布日期
1942.03.03
申请号
US19400346091
申请日期
1940.07.18
申请人
WALWORTH PATENTS INC.
发明人
TROTT ARTHUR J.
分类号
F16K27/02
主分类号
F16K27/02
代理机构
代理人
主权项
地址
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