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发明名称
CHECK VALVE DEVICE
摘要
申请公布号
CA374709(A)
申请公布日期
1938.06.28
申请号
CAD374709
申请日期
申请人
THE CANADIAN WESTINGHOUSE COMPANY
发明人
WILLARD I. CONANT;CLYDE C. FARMER
分类号
主分类号
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