movable center

• 弹性顶尖

movable center的用法和样例：

例句

1. Part mapping and assembly drawings of a tailstock center.
   测绘顶尖尾架三维装配体。
2. The dead center, being a stationary bearing point, must be lubricated.
   由于是固定的支承点，死顶尖必须润滑。