Constant reading depth indicator and flow valve therefor,申请号US19280326754-传众专利搜索

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发明名称	Constant reading depth indicator and flow valve therefor
摘要
申请公布号	US1931274(A)	申请公布日期	1933.10.17
申请号	US19280326754	申请日期	1928.12.18
申请人	PNEUMERCATOR COMPANY	发明人	THOMAS WILLIAM
分类号	G01F23/16	主分类号	G01F23/16
代理机构		代理人
主权项
地址

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