... .time and cost saving 4.easy to construction Steel structure car exhibition hall included the main structure( steel beam/girder, steel ... , steel bracing, tie-bar, etc), door and windows, and other accessories I. We have our own technical teams, so we can ... ( Aluminum alloy and PVC) D. We also have so many accessories, for example, steel bracket, bolts, self-taping screw, rivet, inter ...