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经营范围
发明名称
Differential check valve structure
摘要
申请公布号
US2988002(A)
申请公布日期
1961.06.13
申请号
US19550517756
申请日期
1955.06.24
申请人
DODD JOHN A
发明人
DODD JOHN A.
分类号
F16K15/04
主分类号
F16K15/04
代理机构
代理人
主权项
地址
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