Oven shell is generally made of thin steel plate, the surface of paint, the studio made of high-quality structural steel plate. Between the shell and the studio filled with aluminum silicate fiber. The heater is installed at the bottom, or the top or both sides can be placed. Temperature control instrument using digital intelligent table, PID adjustment: configuration 999.99 hours time controller and connected with the alarm device. So that the operation of the oven easier, faster and effective.