1 中华人民共和国国家标准 城市轨道交通技术规范 GB 50490—2009 条文说明 1 目 录 1 总则 ·················································································································· 1 3 基本规定 ············································································································ 2 4 运营 ·················································································································· 5 4．1 行车管理 ···································································································· 5 4．2 客运服务 ···································································································· 6 4．3 维修 ·········································································································· 6 4．4 车辆基地 ···································································································· 6 5 车辆 ·················································································································· 7 5．1 一般要求 ·····················...
