Inground boring technique including real time transducer,申请号US19880188958-传众专利搜索

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发明名称	Inground boring technique including real time transducer
摘要
申请公布号	US4864293(A)	申请公布日期	1989.09.05
申请号	US19880188958	申请日期	1988.04.29
申请人	FLOWMOLE CORPORATION	发明人	CHAU, ALBERT W.
分类号	E21B44/00;E21B47/12	主分类号	E21B44/00
代理机构		代理人
主权项
地址

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