... fabricate and install all kinds of steel structure warehouse,workshop,showroom,shopping mall ,store etc. A: We ... come from USA, Austrialia,and europe,etcthe construction include warehouse,workshop,stadium,supermaket ,store etcD: Features : Light weight & ... window)12Optional accessoriesCeilingMineral cotton acoustic board sprung roof,PVC sprung roof,aluminum gusset sprung roof.13WaterProvided plan, ...