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发明名称
NON-RETURN FLOW VALVE
摘要
申请公布号
CA494145(A)
申请公布日期
1953.06.30
申请号
CAD494145
申请日期
申请人
SADYE F. NUENEMANN
发明人
WALLACE D. NUENEMANN
分类号
主分类号
代理机构
代理人
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