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发明名称
DRAIN VALVE
摘要
申请公布号
CA376730(A)
申请公布日期
1938.09.27
申请号
CAD376730
申请日期
申请人
CANADIAN WESTINGHOUSE COMPANY
发明人
BURTON S. AIKMAN
分类号
主分类号
代理机构
代理人
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