Steel structure space tube truss 1.Esay to install 2.Advanced drainage system 3.Professional design Steel structure space tube truss ... artistical, fashionable and durable; What's more, can reduce pollutions to the enviroment. 1. Certificate: ISO 14001: 2004, ISO 9001 ... : 20082. Features: Fast and flexible to assemble, secure and safe, thermal and noise insulation, water proof ...