1,Microcrystal Glass Faceplate 2,High Quality Crystal Plate 3,Stainless Steel Suitable for factory, school, ... , Environmental protection: no flame, no dust, exhaust no pollution air, ultra low noise design (below 45 db), optimized kitchen environment ... Convenient operation: handle opening (or knob switch). The output power can be adjusted flexibly;Advance: advanced microcomputer control system, has ...