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发明名称
Check valve
摘要
申请公布号
US2216622(A)
申请公布日期
1940.10.01
申请号
US19380184531
申请日期
1938.01.12
申请人
MILLER JOHN R
发明人
MILLER JOHN R.
分类号
F16K15/02
主分类号
F16K15/02
代理机构
代理人
主权项
地址
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