Bi-directional time delay valve,申请号US19630256322-传众专利搜索

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发明名称	Bi-directional time delay valve
摘要
申请公布号	US3256906(A)	申请公布日期	1966.06.21
申请号	US19630256322	申请日期	1963.02.05
申请人	LUDWIG WALTER D	发明人	LUDWIG WALTER D.
分类号	F15B13/00;F15B13/042;F16K31/48;G05D16/10	主分类号	F15B13/00
代理机构		代理人
主权项
地址

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