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法人/股东/高管

发明名称	Valve
摘要
申请公布号	US2573761(A)	申请公布日期	1951.11.06
申请号	US19460669665	申请日期	1946.05.14
申请人	FIRTH MARCIE R	发明人	FIRTH MARCIE R.
分类号	E21B34/08	主分类号	E21B34/08
代理机构		代理人
主权项
地址

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