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发明名称
Automatic drain valve
摘要
申请公布号
US1820138(A)
申请公布日期
1931.08.25
申请号
US19300440538
申请日期
1930.03.31
申请人
HARGIS ANDREW B
发明人
HARGIS ANDREW B.
分类号
F16T1/12
主分类号
F16T1/12
代理机构
代理人
主权项
地址
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