Well cementing apparatus,申请号US19290391664-传众专利搜索

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发明名称	Well cementing apparatus
摘要
申请公布号	US1830851(A)	申请公布日期	1931.11.10
申请号	US19290391664	申请日期	1929.09.10
申请人	MURPHY SAMUEL J	发明人	MURPHY SAMUEL J.
分类号	E21B21/10	主分类号	E21B21/10
代理机构		代理人
主权项
地址

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