APPARATUS FOR MAINTAINING CONSTANT VACUUM LEVEL IN VACUUM SYSTEM,申请号PL19880270282-传众专利搜索

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发明名称	APPARATUS FOR MAINTAINING CONSTANT VACUUM LEVEL IN VACUUM SYSTEM
摘要
申请公布号	PL151638(B1)	申请公布日期	1990.09.28
申请号	PL19880270282	申请日期	1988.01.23
申请人		发明人
分类号	A01J7/00;F16K7/17;G05D;G05D16/06;(IPC1-7):G05D16/06	主分类号	A01J7/00
代理机构		代理人
主权项
地址

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