Inner spacer for double wall vent pipe,申请号US19520289756-传众专利搜索

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发明名称	Inner spacer for double wall vent pipe
摘要
申请公布号	US2714395(A)	申请公布日期	1955.08.02
申请号	US19520289756	申请日期	1952.05.24
申请人	SAUL EPSTEIN	发明人	EPSTEIN SAUL
分类号	F16L7/00;F24F7/00	主分类号	F16L7/00
代理机构		代理人
主权项
地址

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