Improvements in or relating to roots-type mechanical high-vacuum pumps,申请号GB19550027370-传众专利搜索

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发明名称	Improvements in or relating to roots-type mechanical high-vacuum pumps
摘要
申请公布号	GB772999(A)	申请公布日期	1957.04.17
申请号	GB19550027370	申请日期	1955.09.26
申请人	W. C. HERAEUS G.M.B.H.	发明人
分类号	F04C18/12	主分类号	F04C18/12
代理机构		代理人
主权项
地址

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