Blow-out preventer,申请号US19270168547-传众专利搜索

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发明名称	Blow-out preventer
摘要
申请公布号	US1861726(A)	申请公布日期	1932.06.07
申请号	US19270168547	申请日期	1927.02.16
申请人	CHESTER A. RASMUSSEN	发明人	TROUT WILLIAM A.
分类号	E21B33/06	主分类号	E21B33/06
代理机构		代理人
主权项
地址

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