the plunger

• 柱塞

the plunger的用法和样例：

例句

1. With the car upside-down, the ball forces the plunger to seat against the guide plate.
   当汽车倾倒时，滚珠迫使柱塞落在支承板上。
2. The only function of the pre-plasticizer is plasticizing, injection is left to another unit called the plunger.
   预熔器只做塑化，注射由独立的柱塞负责。