您要查找的是不是：
- ratchet screw jack 棘轮螺旋起重器
- 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 5 ton. 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 5tons. 这个吊链（油压千斤顶、螺旋千斤顶）的起重能力为5吨。
- 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。
- semi-automatic ratchet screw driver 半自动棘轮式螺丝刀
- Design and Calculation of Screw Jack 螺旋千斤顶的设计计算
- Jack was assigned to the assembly shop of the factory. 杰克被分配到厂里的装配间工作。
- I am longing to see my friend Jack again. 我渴望再见到我的朋友杰克。
- I can't get this screw to come out of the wall. 我无法把这颗螺丝钉从墙上取出。
- He has no intention to jack up the plan. 他没有放弃这个计划的意思。
- The fire cracker went off and scared Jack's dog. 爆竹爆炸声把杰克的狗吓了一跳。
- The brackets want an extra screw. 托架需要再加一个螺钉。
- Do you think Jack could bite in his secret want? 你以为杰克能忍住不说出他藏在心里的欲望吗？
- Jack and Mary are cut out for each other. 杰克和玛丽真是天造地设的一对。
- Jack was fired twice but both times taken back. 杰克曾两次被解雇，但两次都被允许回去工作。
- The firecracker went off and scared Jack's dog. 爆竹响了，吓了杰克的狗一跳。
- Jack planted himself in front of the fire. 杰克站在炉火前一动也不动。
- Jack went zooming past in his new car. 杰克驾驶他的新汽车呼啸而过。
