The attractive force between the dimer and the needle drew the lower atom of the dimer upward, causing the dimer to shift from one position to the other.
二聚体与探针之间的引力将二聚体中较低原子向上方拉动，使二聚体从一种姿态切换至另一种。
2
Adopts double idler wheels and needle feed materials at the same time, strong slope climbing force, small change of needle.
采用滚轮及针送同步送科，爬坡力强，针距变化小，针位极稳固。
3
The fillister in both sides of the needle-bar can protect and carry fabrics and reduce puncture force.