... from the damages by insects, such as white antsVentilation: a combination of natural ventilation & air supply keep the indoor air ... meters Installation: It takes 10 workers 20-30 days to install a villa for 250 square meters. LIGHT STEEL STRUCTURE DRAWING: ... marked easy to erect), tile, gutter, wall panel, floor, window, door, sanitary, kitchen...and full set of instruction... 2.Specifications: (Ⅰ) ...