牵引

In view of the character of shearers drum lifting by memory program controlling,this paper analyzes various factors influencing sample period .

针对采煤机滚筒记忆程控调高的特征，分析了影响采样周期大小的诸多因素，以采煤机牵引行走位移作为采样间隔的标尺，给出了等位移间隔作为采样周期的理论值。

Objective To find out an effective approach to treat fracture of metacarpal bone and phalanges,especially near the joint fracture.

目的 寻求掌指骨骨折，特别是关节附近掌指骨骨折更为简便、有效的牵引和固定方法。

BE led the vision to a surface by his question up, Li3 Lang2 Ye2 noticed pond water for the first time of strange appearance-in normal times in knit the Mian generally drifting green Ping, light the Qiao sweetly packs fallen petal of order water mirror and sees the glorious carp that the shadow of human figure would float to connect Die up the surface, why all be missing?

被他的疑问将目光牵引到了水面上，李琅琊第一次注意到了池水的异状--平日里织绵一般漂浮的绿萍、轻俏可爱地装点着水镜的落花、看到人影就会浮上水面接鲽的锦鲤，为什么都不见了？

Methods Twenty cases caused by the missal movement of the upper molar aged 10.5～11.5 years were included in this study.

在临床治疗中可以夜间带头帽或颈带配合口外弓，或活动矫治器，也可以使用螺旋弹簧、Ⅱ类牵引、滑动杆或pendulum等［1～5］。

For more than 34 years we have supplied the medical community with orthopedic medical devices such as sacro lumbar belts, dorsal lumbar belts both corsets and moldable insert, Ottenberg style elbow splint, pelvic traction belts, arm slings, cervical collars, acromio clavicular splints, ankle supports,ect.

我们生产全套的整形外科产品。34年多来我们已经供应医药社区诸如sacro腰带，背部腰带整形肘部夹板，骨盆牵引带，臂部吊索，护肩，脚踝支架等。

After contrasting and optimizing this paper gets a set of parameters. Then according to these parameters the paper sets up entity model, and after validating and analyzing with finite element it can save time of calculating. On the other hand, it can provide a good method of design of moldboard plow surface.

通过对这四个阶段中土垡的运动学和动力学分析研究，建立了犁体牵引阻力的数学模型；通过对比分析得到较优的一组参数，然后以该组参数为依据进行参数优化，最后以优化后的参数建立犁体实体模型，应用有限元进行分析，节省了计算时间和提高了计算效率，为今后犁体曲面设计提供了一种方法。

This paper analyses and calculates the plow parameters about two kinds of high speed plows LEMKEN and KUHN, and studys the relation between the geometric parameters of shape of moldboard plow surface and soil properties, plowing quality, forces properties, plowing speed, resistance and energy dissipation during the plowing. Then according to the direction of developing high efficiency and saving-energy agriculture, under the premise of good farming quality this article puts forward a kind of method setting the mathematics model about plow resistance through the new cultivation principle and the new design principle.

本文通过对比分析的手段对LEMKEN和KUHN两种高速犁参数两种犁体曲面参数进行量化分析计算，分析犁体曲面形状的几何参数与耕后质量、土壤的力学特性、耕速、阻力和功率消耗等相关关系，结合目前高效节能型农业的发展方向，提出在保证作业质量的前提下，应用新型耕作理论和新型设计理论建立牵引阻力数学模型。

By means of the equilibrium equation for the force and moment of the rope tractive parallel robot the method for judging whether a configuration was within the working space or not was obtained.

通过绳牵引并联机器人的力和力矩平衡方程得出了判断一个位形是否在工作空间中的方法。

AC-DC-AC drive technique ; locomotive ; motor coach ; asynchronous traction motor ; radial bogie.

交－直－交传动技术；机车；动车；异步牵引电动机；径向转向架

A board pulled over the water by a motorboat and ridden by a person standing up.

滑水板由机动船牵引水面上的板，并由站在上面的人乘坐操纵

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。