Cementing apparatus,申请号US19380200087-传众专利搜索

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发明名称	Cementing apparatus
摘要
申请公布号	US2197920(A)	申请公布日期	1940.04.23
申请号	US19380200087	申请日期	1938.04.05
申请人	BROWN CICERO C	发明人	BROWN CICERO C.
分类号	E21B33/134	主分类号	E21B33/134
代理机构		代理人
主权项
地址

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