千斤顶

This device designed by authors uses lifting mechanisms separately and can be replaced by outer screw jack for satisfying the condition of excavating and lining in a tunnel at the same time.

这种台车在满足掘进和衬砌平行作业的前提下，将台车上调幅机构中的升降机构独立，由外部千斤顶代替。

There have three compress modes, such as hand jack, electromotion screw compress and hydraulic compress.The material of the filter plate is cast iron,stainless steel,polypropylene and rubber etc.

压紧形式分为：手动千斤顶、电动螺旋压紧和液压压紧三种压紧形式；滤板材质有铸铁、不锈钢、聚丙烯和橡胶等材料制造。

If you were walking along the beach and stumbled upon a small seashell and put it on the tip of a condom, you'd have the Inspiral.

如果你在海边耍，被一个小贝壳绊了一下，那就把那贝壳放在套套的头部，这就是"千斤顶"的外型。

Fuzhou Snit Mechanical Equipment Co.,Ltd ---- Specialize in automobile equipment maintenance,one of the most professional manufacturers of pneumatic jack in china.

专业从事汽车维修设备的生产，中国最专业的气动液压千斤顶生产厂家。

Properly inflated spare tire, jack and wheel wrench.

合适充气的备胎、千斤顶和轮胎扳手。

What they needed were planks to stabilise the debris and jacks to lift it.

他们需要的是用来固定他残躯的厚木板和能把他抬出来的千斤顶。

He went through the tool chest, but just could not find the jack, what was he gonna do?

年轻人下来翻遍了工具箱，也没有找到千斤顶。

This article introduced field assembly of large-scale tower s adopting jack,the welding of the shell,heat treating and hydrostatical test.

介绍了大型塔器现场采用千斤顶进行组对、焊接、热处理、水压试验，同时对如何解决塔段出现椭圆变形超标的问题进行阐述。

Adopting whorl driving can change circular movement to linal movement, and the automatic-locking function can ensure the using security, we develop the structure, analyze the principle, make necessary mechanics analyses, push over the formula, and make it clear that the jack is logical in structure, smart in power knighthead, durable in use, and with a big proportion of output and input.

利用蜗杆传动、螺纹传动，将转动变换为直线运动、将转矩转换为和向力；同时利用螺纹传动的自锁作用，保证使用安全可靠。结果设计出了多功能千斤顶的主要结构，分析了其工作原理，进行了必要的力学分析，推导出数据计算的有关公式等。

Of or belonging to the phylum Nemertina.

螺旋起重机，螺旋千斤顶由螺旋杆运作的起重机

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。