螺旋千斤頂：screw jack

例句：
The lifting capacity of this screw jack hoist is 5 ton.
這個螺旋千斤頂的起重能力為5噸.

each of the four legs contains a simple screw jack with a thrust bearing that is operated telescopically inside of two tubes.
四條腿中每個都裝有一個簡單的螺旋千斤頂，千斤頂中又有一個在兩根管道中做伸縮操作的推力軸承。