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发明名称
Valve seat
摘要
申请公布号
US2263750(A)
申请公布日期
1941.11.25
申请号
US19400341317
申请日期
1940.06.19
申请人
THE NATIONAL SUPPLY COMPANY
发明人
WILLKE HERBERT L.
分类号
F16K1/42
主分类号
F16K1/42
代理机构
代理人
主权项
地址
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