... groove interlock construction, thickness: 50MM, roof panel: galvanized plateBasement and floorComplete steel assemble, height:300mm, 2 rows of ... setting typeSide upper intake air, quadrate steel frame, blue coated steel.Intake fan2-set double-intake centrifugal ... systemPre-filter, high efficiency filter(ceiling filter), floor filter, extract activated carbon filterControl systemSpraying, heated ...