1.HLS-3020HP-2 with 2times hook,-3 with three times hook,-6 with six times hook;
2.New arm bed to be longer and  23KGS heavier compared with old version,more stable for sewing;
3.Upgrade pneumatic durkopp alder type thread tension device to decrease thread broken more than 20%;
4.Use 15mm guider to instead 9mm,and Y direction upgrade 4pcs guiders while before 2pcs,. The accuracy is improved by more than 90%,the durability is enhanced by more than 50%, and the load-bearing capacity is increased by more than 80%;
5.Upgrade transmit optimize control system;
6.The direct connection ratio of the motor is increased from 1:1 to 1:2.5, the power is enhanced by 70%, high-speed sewing is more precise, and the vibration and noise are reduced by 20%;
7.Fast change module;