A slender, usually cylindrical piece of wood or metal for holding or fastening parts together, or serving as a support for suspending one thing from another, as.
2
从动装置是一个圆柱形的组件，带有一个螺旋状的槽和一个销子。
"The follower is a cylindrical component with a helical slot and a pin that runs through it," he adds.
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