Device for evacuating pumps,申请号US19280286640-传众专利搜索

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发明名称	Device for evacuating pumps
摘要
申请公布号	US1764640(A)	申请公布日期	1930.06.17
申请号	US19280286640	申请日期	1928.06.19
申请人	FRANZ OBERASCHER	发明人	OBERASCHER FRANZ
分类号	F04D9/06	主分类号	F04D9/06
代理机构		代理人
主权项
地址

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