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发明名称
摘要
申请公布号	FR2137815(A1)	申请公布日期	1972.12.29
申请号	FR19720017003	申请日期	1972.05.12
申请人	BRITISH RAILWAYS BOARD	发明人
分类号	B61L3/12;(IPC1-7):G08C17/00;B61L3/00;G08B1/00	主分类号	B61L3/12
代理机构		代理人
主权项
地址

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