Features: 1. Computer automated control Nm two-speed motor drive design controller adopts USB interface mode to automatically circulate oil pumping operation without noise, and automatic shutdown device for warp, weft, bottom yarn, and tape rolling. Optional functional devices: 1. Double roller device (double thick, double thin, double excellent, double middle, upper thin and lower excellent,) 2 Single roller device (single coarse, single fine, single excellent) 3 double hook and double needle device 4 double hook single needle device 5 Double weft and double bottom line 6 double weft single bottom line 7 single weft and single bottom line 8. Single weft and double bottom line 9. Enlarge opening device 10. Steel wire spring return group