Repulsing clays on drill bits,申请号US05/554883-传众专利搜索

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发明名称	Repulsing clays on drill bits
摘要
申请公布号	USRE29151(E1)	申请公布日期	1977.03.15
申请号	US05/554883	申请日期	1975.03.27
申请人		发明人
分类号		主分类号
代理机构		代理人
主权项
地址

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