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They are very suitable for bright annealing of silicon-steel plates, soft-magnetic materials, electrician malleable cast-iro, copper alloy; for bright annealing of high-speed steel, die steel, tool steel, alloy steel, titanium alloy; removing the residual stress of forge piece, welding piece, cool punching piece, and work piece punching, so as to defend the distortion and crazing of the workpiece.Our equipments have high-accuracy, high-stability, high-reliability, and long working time.They are very suitable for scientific research and education and for the large-scale development of new commercial products.  Main technical specifications are as follows:Vacuum sytem: Diffusion pump+Vane pump   or   Molecular pump+ Vane pumpVacuum chamber: Φ350×H500mm, Stainless steel double-layer coolingUtimate vacuum: 8.0×10-4Pa(Diffusion pump)   or  8.0×10-4Pa(Molecular pump)Power supply: 5KWHeating temperature:273-1273KVacuum measure