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发明名称
DRAIN VALVE APPARATUS
摘要
申请公布号
CA426686(A)
申请公布日期
1945.04.10
申请号
CAD426686
申请日期
申请人
CANADIAN WESTINGHOUSE COMPANY
发明人
ROBERT M. OLIVER
分类号
主分类号
代理机构
代理人
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地址
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