... glass,cement&engineering test. SG-XX-YY High-Temperature Tube (gas) Electric Furnace (Model: SG-xx-yy-tt vacuum atmosphere furnace) ... zone length are customized by the user; recycled water and gas source should be fitout;10. Accessories & spare parts: ... configuration: the host (including the furnace, temperature control system, gas control system, vacuum system, mechanical pump) Accessories: low-vacuum ...