... db1. Wallboard & roof panel- EPS colorful board, 50 mm thick,steel 0.376mm thick, tongue & groove style, compound construction, anti-flame and ... heat-insulation, galvanized steel roof panel.2. Basement- Metal ... - Air-Intake Fan* 1unit, Centrifugal Fan with 4kw motor, 2 sets,air capacity 25000m3/h in total. - Air-Exhaust Fan ...