Specific gravity indicator for drilling mud,申请号US19380206327-传众专利搜索

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发明名称	Specific gravity indicator for drilling mud
摘要
申请公布号	US2373795(A)	申请公布日期	1945.04.17
申请号	US19380206327	申请日期	1938.05.06
申请人	WARREN JR JOHN B	发明人	JR. JOHN B. WARREN,
分类号	G01N9/26	主分类号	G01N9/26
代理机构		代理人
主权项
地址

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