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张云龙

张云龙张云龙
  1. 王艳丽,张云龙,费以原钢筋混凝土井式梁在屋面和非承墙、板荷载的楼面结构多有出现。

    Derrick-type reinforced concrete beam often appears in the framework of house walls and building walls that don 't support the weight of walls , boards and so on .