... steadily, high-speed, no scratches, no crease on the original sheet;2. Tension control using import statistics tension control system with the ... steel manufactures, vacuum chamber size φ1000~1400mm;2. The vacuum system with 1 to 2 diffusion pump, Roots pump, mechanical pump, uses ... vapor trap. Technical Parameters:1. Ultimate vacuum: 7×10-3Pa;2. Secondary recovery time: <10min changing from 1×105 Pa and ...