1、Thermotechnical materials are all made of light alumina fiber products that piece together; the supporting structure is made of corundum, which will not crack, nor collapse.
2. Furnace chamber is sealed with a step-style convex and concave seal, which guarantee the tightness.
3. The load bearing board is made of corundum-mullite, with corundum-mullite buried at the bottom, to effectively bear load and to prevent the board from sinking.