Vacuum chamber evacuation,申请号US19450628428-传众专利搜索

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发明名称	Vacuum chamber evacuation
摘要
申请公布号	US2460197(A)	申请公布日期	1949.01.25
申请号	US19450628428	申请日期	1945.11.14
申请人	CHAIN BELT COMPANY	发明人	JR. HORACE L. SMITH,
分类号	F04F5/20;F26B5/04;F26B21/08	主分类号	F04F5/20
代理机构		代理人
主权项
地址

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