中文字幕精品一区二区2021年-国产交换配乱婬视频偷网站-国产老熟女伦老熟妇露脸-丰满人妻熟妇乱又伦精品-亚洲欧洲av综合一区二区三区

XQJ series of cable tray
 

       XQJ series cable bridge cable bridge is a kind of common products, divided into ladder type, conteau disc, conteau disc (trough) and combined. The bearing capacity of the bridge mainly depends on the thickness of the steel plate, in the rate of bearing capacity and material are not as good as the reinforced lightweight bridge structure, due to the plate thickness selection is relatively thick, relatively heavy weight, installation of labor and time consuming low cost, but has the advantages of simple manufacturing process, convenient production. It is a kind of product which belongs to the extensive consumption pattern. In recent years, with the promulgation and implementation of the national standard of energy saving and corrosion resistant steel cable tray and the change of social usage habits, the XQJ series cable tray market has been gradually replaced by the energy saving corrosion resistant steel cable tray.