Spring Force of Constant Torque Spring and Wing-up Spring
contact spring pile-up (contact spring assembly)
spring wheat spring corn intercropping system
a cylinder-shape and non-whorl pin
Absorbable intramedullary pin
alignment pin
定位销
对中销
调正插针
直接转化工艺
调整脚
定位锁
定位梢
对准销