Lens adjustment spring 镜头调节弹簧

Spring tension adjustment 弹簧张力调整

speeder spring adjustment bolt 增速器弹簧调整螺栓

centering spring adjustment nut 定心弹簧调整螺母

spring adjustment 调簧

spring compression adjustment 弹簧压紧调整装置

dual spring tension adjustment 双层弹簧拉紧调节

spring adjustment nut 弹簧调整螺母

SPRING ADJUSTMENT PIN 弹簧调节销