Drilling apparatus with means for controlling the feed and supply of drill fluid to the drill,申请号US19660568602-传众专利搜索

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发明名称	Drilling apparatus with means for controlling the feed and supply of drill fluid to the drill
摘要
申请公布号	US3385376(A)	申请公布日期	1968.05.28
申请号	US19660568602	申请日期	1966.07.28
申请人	HENRY HOBHOUSE	发明人	HOBHOUSE HENRY
分类号	B23B47/22;E21B21/08;E21B44/06	主分类号	B23B47/22
代理机构		代理人
主权项
地址

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