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This paper also researches on the kinematics and mechanics of the push-pull air-cushion vehicle. By velocity composition method, the velocity vector formulae of any point on moving platform is obtained.

本文还就推拉式气垫车运动学和力学两个方面进行了详细的分析，运用速度合成法得到了气垫车转向过程中，运动平台上任意点的速度矢量公式。

The push-pull air-cushion vehicle has perfect adjust function on speed and steering, this profits from the controllable characteristics of the cylinders.

得到了上述关系方程式，就可以对气垫车的速度和转向进行实时调节。

Push-pull air-cushion platform is the first non-continuously moving air-cushion vehicle that applied worming bionic principle.

推拉式气垫运载平台是第一台应用蠕动式仿生原理设计的非连续运动型气垫车，这不同于以往设计的气垫车。

Considering the characteristics of the push-pull air-cushion vehicle, this paper gives the definition of pace steering angle, that is taking the actual steering angle of the moving platform in one pace circle as a pace steering angle.

针对上述问题，结合推拉式气垫车的运动特点，文章给出了单步转向角这样一个定义，即以车辆的一个步进工作循环下运动平台的实际转角作为一个单步转向角，气垫车的实际转向角通过各单步转向角累加而成。

The non-continuously moving state lies on the vehicle's structural characteristic. This air-cushion vehicle has two platforms, which are connected by two hydraulic cylinders. When it moves, one platform is fixed on ground as the base platform, and takes the other one as moving platform, then the vehicle can go forward by alternate movement of these two platforms. So the push-pull air-cushion vehicle is a self-propelled vehicle.

它的非连续运动形态取决于其结构特点，该气垫车由两个对称的子平台组成，中间通过液压油缸相铰接，运动时总是固定其中一个平台作为基础平台，而将另一个平台作为运动平台，基础平台通过液压缸推出或拉进运动平台交替动作，实现运动，因此推拉式气垫车是一种自走式气垫车。

Go ahead and pull your airship right next to mine.

没有关系现在就在我旁边。

Every time Grandpa and this old friend of his went out to dinner, they'd pull an Alphonse and Gaston act at the restaurant entrance.

每次爷爷同他那位老朋友去餐馆，他们总要在门口像阿尔方斯和加斯通做戏那样，你推我让，客气一番。

The company produces the processing equipment to be advanced, check-out facility excellent, has the numerical control lathe, the numerical control drilling machine, the machining center, the numerical control gear-hobbing machine, the gear shaper, the fine borer, the universal milling machines, each kind of grinder, the table planer, the booklet bender, the large-scale lathe, the mechanical slicer, high intermediate frequency quenching, the well type, the box-type hardening furnace, the tempering furnace, the automatic welding machine, the X-ray crack detection machine, the cloth, the Rockwell tester; Electric hoist test platform, sound-level meter, varnish film thickness gauge, altazimuth, level; The material analysis laboratory, the metallography analysis room and so on full had guaranteed strictly the vehicle, the mill, dig, rub, pull, the boring, to drill, the ramming, cutting, the angle iron, the chemical examination and the heat treatment and so on complete technical process.

公司生产加工设备先进，检测设备精良，拥有数控车床、数控钻床、加工中心、数控滚齿机、插齿机、精密镗床、万能铣床、各种磨床、龙门刨床、折弯机、大型车床、刨床、高中频淬火、井式、箱式淬火炉、回火炉、自动焊机、 X射线探伤机、布、洛氏硬度计；电动葫芦试验台、声级计、漆膜测厚仪、经纬仪、水准仪；材料分析化验室，金相分析室等充分严格保证了车、铣、刨、磨、拉、镗、钻、冲压、切割、弯板、化验及热处理等全部工艺流程。

Variable : alternate the pull, first with one hand, then with the other.

变量：交替拉，首先用一只手。

Removable trigger unit has adjustable trigger pull and is fitted with conveniently located ambidextrous safety.

可移动触发单位可调触发拉，并与交通方便灵巧的安全装置。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。