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发明名称
Valve
摘要
申请公布号
US2619116(A)
申请公布日期
1952.11.25
申请号
US19480060925
申请日期
1948.11.19
申请人
RALSTON JOHN D
发明人
RALSTON JOHN D.
分类号
F16K23/00;F16K31/06
主分类号
F16K23/00
代理机构
代理人
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