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1·The utility model relates to a jack screw and plug screw driver, which is characterized in that a hole is drilled along an axial direction in a screw, and a plug is added on the head of a screwdriver.

一种插孔螺钉及插头螺丝刀。它是在螺钉上沿轴向钻了一个孔，在螺丝刀头部加了一个插头。

2·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。

3·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。

4·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。

5·The hoisting jack calls the mechanical hoisting jack, is by the manpower through the screw vice-transmission, the screw rod or the nut sleeve achievement goes against lifts.

液压千斤顶又称机械式千斤顶，是由人力通过螺旋副传动，螺杆或螺母套筒作为顶举件。

6·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。

7·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。

8·The micro motion drive unit is a highly refined screw-driven hydraulic jack.

微形传动装置是一个极精制的螺杆用液压作动筒。

9·Convenience : The water chestnut of the screw can fit exactly into this special desighed spanner, which avoids the problem of slipping out as using the normal jack handles.

简便：可以避免一般千斤顶在负载时必需双手操作或摇杆容易脱钩的缺点，配套的扳手与菱角螺杆起着互相固定的作用。

10·The screw jack can the long-term support heavy item, the greatest lifting capacity amount to 100 tons, the application is broad.

螺旋千斤顶能长期支持重物，最大起重量已达100吨，应用较广。