... ground for exhaust air, dimension of each pit is 10000×750 mm(L×W)4) Main door: 3-folds, 3300×3400 mmW ... ,Colour: same as room body5) Escape door: 1-fold, 700X2000 mm (WXH), Colour: same as room body 6) Wall Panels: thickness ... : 70 mm,Widthh:1150 mm, tongue and groove structure, made by 0.426mm colour ...