Valve locking device,申请号US19370140098-传众专利搜索

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发明名称	Valve locking device
摘要
申请公布号	US2182278(A)	申请公布日期	1939.12.05
申请号	US19370140098	申请日期	1937.05.01
申请人	WALTER BRAUER	发明人	BRAUER WALTER
分类号	E21B21/10;F16K15/06	主分类号	E21B21/10
代理机构		代理人
主权项
地址

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