... / CM); Constant temperature zone length: 100mm, 200mm, 300mm,furnace heating time ≤ 180 min Insulation materials: polycrystalline mullite fiber; ... effective diameter ≥ 60mm);9. The product is horizontal structure, the furnace and the the control console is split style ... & spare parts: basic configuration: the host (including the furnace, temperature control system, gas control system, vacuum system, ...