北京天桥

北京天桥北京天桥
  1. 北京天桥粉末冶金厂的诞生与发展

    The birth and development of Beijing Tianqiao powder metallurgy plant

  2. 北京西站天桥I段钢桁架工程试拼装新工艺铁路枢纽与城市交通系统的整合研究&成都铁路枢纽为城市服务的实施方案

    NEW TRIAL FIXING PROCESS OF OVERLINE BRIDGE SECTION I STEEL TRUSS FOR BEIJING WEST RAILWAY STATION Study on Integration of Railway Station and Metropolitan Traffic