N a lifting device utilizing the mechanical advantage of a screw thread, the effort being applied through a bevel drive 千斤顶 (Also called jackscrew, jack)
We can adjust the levelness of the machine by means of shim and screw jack.
我们可以利用垫铁和螺丝千斤顶来调整机器的水平度。
We can conform the levelness of the machine by means of shim and screw jack.
我们可能利用垫铁和螺丝千斤顶来调零件器的水平度。
The lifting capacity of this chain hoist (hydraulic jack, screw jack) is 5 tons.
这个倒链（油压千斤顶、螺旋千斤顶）的起重能力为 5 吨。
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