... a special design, it essures machine runs quietly under high speed and long time.2.The machine is produce precisely, highly-compatible ... 4.Double motor design, adapt to fast adjusted for the machine.5.With "double hook single needle" and "double ... yarn-stop display. Output calculation, auto-return after stop.Machine Model 8/27 6/42 4/66 No. Of ... H.P 2 H.P 2 H.P Rotation Speed 1,300-1,500 rpm 1,300-1,500 ...