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发明名称
DUPLEX CONTROL VALVE DEVICE
摘要
申请公布号
CA455495(A)
申请公布日期
1949.03.29
申请号
CAD455495
申请日期
申请人
CANADIAN WESTINGHOUSE COMPANY
发明人
HARRY C. MAY
分类号
主分类号
代理机构
代理人
主权项
地址
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