... low butt jack, it can knit pane,pepper and salt,strip cord and so onDensity Controlled by stepper motor, 8 ... system multistage combined type roll system.controled by DC electric machine, 4 grade to adjust.transmission mode frequency control, synchronous ... working and stop, Red: regular working and stopsafty cover whole machine covered by transparent plexiglass, saftey, low voice.computer control ...