Process and means for the production of vacua,申请号GB19470001544-传众专利搜索

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发明名称	Process and means for the production of vacua
摘要
申请公布号	GB635614(A)	申请公布日期	1950.04.12
申请号	GB19470001544	申请日期	1947.01.16
申请人	PAUL ALEXANDER	发明人
分类号	F04F9/00	主分类号	F04F9/00
代理机构		代理人
主权项
地址

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