下层甲板的主梁必须立即用螺旋千斤顶进行支撑。
The main-beams of the lower deck had to be shored with screw-jacks forthwith.
自降螺旋千斤顶的螺纹无自锁作用，装有制动器。
From falls screw jack's thread non-self-locking action, is loaded with the brake.
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 5 tons.
该产品选用了螺旋千斤顶制作的移动平台有着广阔的应用范围。
This product selection in the spiral thousand 3 Jin made top mobile platform has a wide application scope.
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。
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：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.
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。
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.
提出了将螺旋千斤顶加压的硫化器改造成液压千斤顶加压、保压的液控硫化器的改进方案。
Puts forward the hydraulic control scheme that spiral jack is reformed hydraulic jack to raise pressure and preserve pressure.
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。
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.
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.
在该工程中采用了新颖的伞型斜向支撑技术，并利用螺旋式千斤顶进行主动支顶。
In connection with an engineering example, this paper introduces the application of a novel active roof-propping technique which uses umbrella-shaped braces and screw jacks for active propping.
在该工程中采用了新颖的伞型斜向支撑技术，并利用螺旋式千斤顶进行主动支顶。
In connection with an engineering example, this paper introduces the application of a novel active roof-propping technique which uses umbrella-shaped braces and screw jacks for active propping.
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