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发明名称
摘要
申请公布号	FR2507243(B1)	申请公布日期	1983.12.02
申请号	FR19810011349	申请日期	1981.06.05
申请人	SYMINEX	发明人
分类号	E21B36/00;E21B43/24;(IPC1-7):E21B43/16;B01D13/02;E21B43/20	主分类号	E21B36/00
代理机构		代理人
主权项
地址

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