ball peen

• 圆头

ball peen的用法和样例：

例句

1. He said he would head the antenna with a ball.
   他说他还要给天线安个圆头。
2. Use a universal puller to separate the ball stud from the frame rail bracket.
   用万能拉出器将圆头螺栓从车架横梁支架上拆下。