It is used for vacuum pressure gas-cooling (with absolute pressure 0.2MPa), Models: WZDJQ-20, WZDJQ-30, WZDJQ-45, and WZDJQ-60.It is used for vacuum pressure gas-cooling (with absolute pressure 0.2MPa), annealing of high-speed steel, high alloy tool steel, and stainless steel, and for sintering and rapid cooling of magnetic materials. WZJQ series pressure-raising gas-quenching vacuum furnace