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。
The lifting capacity of this chain hoist (hydraulic jack, screw jack) is 5tons.
这个吊链（油压千斤顶、螺旋千斤 顶）的起重能力为5吨。
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。
The lifting capacity of this chain hoist ( hydraulic jack , screw jack ) is 5tons.
这个吊链（油压千斤顶、螺旋千斤顶）的起重能力为5吨。
The ordinary screw jack depending on the thread self-locking action support heavy item, the structure is simple, but the transmission efficiency is low, the return trip is slow.
普通螺旋千斤顶靠螺纹自锁作用支持重物，构造简单，但传动效率低，返程慢。
Screw jack: Uses the screw rod or the fluctuation sleeve which impels by the screw rod goes against as the rigidity lifts a hoisting jack.
螺旋千斤顶：采用螺杆或由螺杆推动的升降套筒作为刚性顶举件的千斤顶。
Screw jack: Uses the screw rod or the fluctuation sleeve which impels by the screw rod goes against as the rigidity lifts a hoisting jack.
螺旋千斤顶：采用螺杆或由螺杆推动的升降套筒作为刚性顶举件的千斤顶。
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