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发明名称
摘要
申请公布号	FR2451474(B1)	申请公布日期	1984.12.28
申请号	FR19800005621	申请日期	1980.03.13
申请人	ORSZAGOS KOOLAJ GAZIPARI TROSZT	发明人
分类号	E21B4/02;F04C2/107;(IPC1-7):F03C2/00	主分类号	E21B4/02
代理机构		代理人
主权项
地址

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