DISPOSITIF D'ETANCHEITE POUR ARBRE ROTATIF,申请号FR19840017883-传众专利搜索

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发明名称	DISPOSITIF D'ETANCHEITE POUR ARBRE ROTATIF
摘要
申请公布号	FR2573838(B1)	申请公布日期	1990.01.19
申请号	FR19840017883	申请日期	1984.11.23
申请人	NL INDUSTRIES INC	发明人	MANMOHAN S. KALSI
分类号	E21B4/00;F03B13/02;F16J15/16;F16J15/18;(IPC1-7):F16J15/24;E21B4/02;E21B17/02;E21B17/04	主分类号	E21B4/00
代理机构		代理人
主权项
地址

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