... front-middle-back tucks , high-low stitch systemMobile-track servo motor racking ,3-needle space at both sides ... ,trangle machine,density televsion,shutle box,mobile machine,voltage instability (frequency-conversion protection)Control system types,amount,mobile track,cloth ... 8-block control) requirements on power supply andelectrical machine AC220,50HZ,drivde motor of 550W computerized flat knitting ...