normal pin

• 垂直销

normal pin的用法和样例：

例句

1. A piston pin fits into a round hole in the piston.
   活塞销装在活塞的环形的孔里。
2. Examine carefully the crank pin for flaws or hair cracks.
   精心检查曲柄销颈有无缺陷或微小裂纹。