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发明名称
Valve
摘要
申请公布号
US2027978(A)
申请公布日期
1936.01.14
申请号
US19350023420
申请日期
1935.05.25
申请人
HOFF JOSEPH B
发明人
HOFF JOSEPH B.
分类号
F16K31/18
主分类号
F16K31/18
代理机构
代理人
主权项
地址
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