SWIVEL FOR CASING PIPE DRILLING,申请号JP19760036326-传众专利搜索

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发明名称	SWIVEL FOR CASING PIPE DRILLING
摘要
申请公布号	JPS52119401(A)	申请公布日期	1977.10.06
申请号	JP19760036326	申请日期	1976.04.01
申请人	DOWA MINING CO	发明人	SHIRANE TAKESHI;NAKAJIMA FUMIO
分类号	E21B17/05	主分类号	E21B17/05
代理机构		代理人
主权项
地址

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