Shanghai exhibition display equipment - The aluminum trusses are designed for advertising agencies, exhibition companies, ceremonial services company, made of aluminum alloy truss butterfly, consists of the following components: 1, four aluminum tube (round 22mm, thickness 1.5mm, double track, oxidation), 2 discs (strength steel, punching, thickness 1.5mm, chrome), 3, connector (50mm * 19mm hex on the edge, thread, chrome), 4, gimbal (aluminum, iron two materials, the outer diameter of 220 * 220, can be removable), 5, connection Wrench (by springs, screws, head, nut, Wrench Five-piece combination, is the latest development of display equipment Shanghai patent product). Product specifications are: 220,160 two kinds of outside diameter between 0.3 m to 3 m length, can be customized. Single truss can withstand 800 kg force, can withstand 320 kg within 10 m span, hang lights, products, printing and so on will not have the slightest bend, sink,