*****, stage, exhibition truss, flight case, speaker truss, steel truss, aluminum alloy truss, folding stage, display equipment, truss system, truss stand, assembling stage, lighting truss, stage truss, light tower, glass stage, moving stage, lighting case, truss lift, plate floor 2.we have past TUV quality safty certificate3.we take part in light and sound exhibition in beijing and shanghai and Frankfurt Gemany every year! we would like to show our more new products .