... ,3 rows of pattern plate,2 rows of grid plate- Drive-in Ramps2pcs size 2000×620mm (L×B)Wall and Door Steel ... gradeCeiling FiltersF5 grade- Exhaust FiltersBottom filter G2 gradeVentilation System - Direct Drive Motor (Fresh Air)1×7.5 kW, 970rpm,380V, 3phase ... ,50Hz ,CE- Direct Drive Motor (Exhaust Air)1×7.5 kW, 970rpm,380V, 3phase ...