A WELL DRILLING BIT,申请号GB19680012053-传众专利搜索

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发明名称	A WELL DRILLING BIT
摘要
申请公布号	GB1219185(A)	申请公布日期	1971.01.13
申请号	GB19680012053	申请日期	1968.03.12
申请人	INSTITUT FRANCAIS DU PETROLE DES CARBURANTS ET LUBRIFIANTS	发明人	WLADIMIR TIRASPOLSKY
分类号	E21B7/18;E21B10/60	主分类号	E21B7/18
代理机构		代理人
主权项
地址

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