Balanced valve mechanism,申请号US19260144215-传众专利搜索

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发明名称	Balanced valve mechanism
摘要
申请公布号	US1836184(A)	申请公布日期	1931.12.15
申请号	US19260144215	申请日期	1926.10.26
申请人	TEXAS IRON WORKS SALES CORPORATION	发明人	NIXON JEDDY D.
分类号	E21B19/16	主分类号	E21B19/16
代理机构		代理人
主权项
地址

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