Improvements in or relating to rotary vacuum pumps,申请号GB19420006944-传众专利搜索

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发明名称	Improvements in or relating to rotary vacuum pumps
摘要
申请公布号	GB553632(A)	申请公布日期	1943.05.28
申请号	GB19420006944	申请日期	1942.05.21
申请人	PUMP ENGINEERING SERVICE CORPORATION	发明人
分类号	F04C18/34;F04C18/344	主分类号	F04C18/34
代理机构		代理人
主权项
地址

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