Each straightpin is cut, chamfered, and polished to remove burrs and enhance performance.
每个圆柱销都需要切割，刻槽，剖光，去刺和增强性能。
2
It started flying around and around trying to get away but it was still pinned by the one wing with the other straightpin.
蝴蝶开始飞来飞去想逃走但是它的一个翅膀仍然被一个圆柱销钉住了。
3
Front wheel shimmy is the phenomenon that steering wheels vibrate around king-pin axis with a certain amplitude and frequency when the vehicle travels in a straight road.