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发明名称
Valve
摘要
申请公布号
US2220170(A)
申请公布日期
1940.11.05
申请号
US19390269601
申请日期
1939.04.24
申请人
NELSON HAROLD L
发明人
NELSON HAROLD L.
分类号
F16K11/056
主分类号
F16K11/056
代理机构
代理人
主权项
地址
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