jack screw

• n. 螺旋千斤顶

英英释义

名词 jackscrew:

1. screw-operated jack

例句

用作名词 (n.)

1. Each of the four legs contains a simple screw jack with a thrust bearing that is operated telescopically inside of two tubes.
   四条腿中每个都装有一个简单的螺旋千斤顶，千斤顶中又有一个在两根管道中做伸缩操作的推力轴承。