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发明名称
IMPROVEMENTS IN RAILWAYS
摘要
申请公布号
GB8921258(D0)
申请公布日期
1989.11.08
申请号
GB19890021258
申请日期
1989.09.20
申请人
BRITISH STEEL PLC;BRITISH RAILWAYS BOARD
发明人
分类号
E01B5/02;E01B5/08;E01B9/68;E01B19/00
主分类号
E01B5/02
代理机构
代理人
主权项
地址
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