... the advantages of fast heating (20-40mins), energy saving, high accuracy of controlling the temperature, reliable heat keeping, auto heating ... field of pottery, chemical industry, metallurgy, and glass industries, new material developing, machinery, fire-proof material, architecture, special material ... ") 1700. C 1700M 500x500x500mm (20"x20"x20") 1700. C Box Chamber Muffle Furnace with high quality