拖拉机

John Deere utility tractor is designed for children 2-5 years and the tractor has a front loader and a backhoe.

约翰迪尔拖拉机工具是专为2-5岁儿童和拖拉机前面有一个反铲装载机和1。

Based on the working condition of the tractor, a new type of electric tractor drive system which combines a motor and a gear, and the evaluation index and the calculation method for dynamic performance of electric tractor are suggested; taking an electric tractor drive system as design object, the balance graph of drive-resistance force, climbable gradient under different shifts, and continuous working time are calculation analyzed.

根据电动拖拉机作业特点，提出了一种电动机和变速箱相结合的电动拖拉机传动系统结构方案，并给出了电动拖拉机动力性能和经济性能评价指标以及电驱动系统主要参数的设计计算方法，以基于串励直流电动机的某型号小四轮电动拖拉机电驱动系统为设计实例，计算分析了该电动拖拉机的驱动力-行驶阻力平衡图、不同挡位下的爬坡度以及连续作业时间。

Researches show that the drive force characteristics of the electric tractor drive system based on series DC motor is close the ideal characteristics, the curves are concave, low speed with constant power, and high speed with constant torque; the electric tractor has large working speed under different shifts, but the extensive coincidence speed shows that the variable ratio of the gear is unreasonable; the maximum climbable gradient of this electric tractor is more than 30%, and does not need frequent shift when working for its extensive climbable gradient; there are many influence factors of continuous working time, which the more obvious factors are working speed and working load, the working time increases with the increase of the working speed and working load.2. Simulation researches on the drive characteristic of the electric tractor.

研究结果表明：基于串励直流电动机(来源：ABC21论文网www.abclunwen.com)的电动拖拉机电驱动系统的驱动力特性场接近理想驱动力特性场，其各挡下的驱动力特性是一组下凹的曲线，低速恒转矩，高速恒功率；同一行驶速度下所对应高挡驱动力大于低挡驱动力，这是由电机的调速特性决定的；电动拖拉机各个挡位下具有较广的稳定作业速度范围，但是各个挡位之间速度重合的范围较多，说明所用变速箱变速比与电动机匹配不合理；电动拖拉机最大爬坡度达到30%以上，并且各挡爬坡度变化范围较广，作业过程中不需要频繁换挡；影响电动拖拉机连续作业时间的因素较多，其中作业行驶速度和作业负荷影响最为明显，作业负荷越大，连续作业时间就越短，作业速度越快，连续作业时间就越短。2、电动拖拉机驱动特性仿真研究。

As the speed detection control and the accuracy and currentness of the speed detection figures have the direct influences on other various detection and calculation results about the parameter , the system is one of the most important subsystem .

由于速度检测控制的好坏及速度检测值的准确性和实时性直接影响其他各项参数的检测和计算结果，所以该系统是履带式拖拉机综合性能测试系统中必不可少的重要子系统之一，速度检测子系统的研究对于优化履带式拖拉机整机性能设计有着至关重要的作用。

Farm tractors are commonly equipped with a power take off, but on a farm tractor, the PTO is built-in to the tractor's main transmission and extends behind the final drive housing just above the drawbar.

农用拖拉机普遍配备了功率起飞，但在一个农场拖拉机，动力输出轴是内置的拖拉机的主要传输和扩展背后的最终驱动住房略高于拉杆。

Because drank wine, he already forgot from the back still pulled a tractor the boss is very fast overtook BMW, proper they with 280 stridden speed whirlwind cars when, was discovered by a pointsman of roadside, want to bar had had not enough time, take out interphone at once, follow police of below one a section of a highway to contact: Hello, hello, hello, discover two Che Zaibiao cars, rate is very rapid, one is BMW, one is to run quickly 600, ask your block them, incorrect, it is 3 Che Zaibiao cars, return from the back closely follow a tractor, and the tractor still is hitting left-hand rotation Xiang Deng, miss overtake other cars on the road...

因为喝了酒，他已忘了后面还拖了一辆拖拉机老板很快的追上了宝马，正当他们以280迈的速度飚车的时候，被路边的一个交通警察发现了，想拦已经来不及了，连忙拿出对讲机，跟下一路段警察联系：喂，喂，喂，发现两辆车在飚车，速度非常快，一个是宝马，一个是奔驰600，请你拦阻他们，不对，是三辆车在飚车，后面还紧紧的跟着一辆拖拉机，并且拖拉机还打着左转向灯，想超车

Variations of the classic style include the diminutive lawn tractors and their more capable and ruggedly constructed cousins, garden tractors , that range from about 10 to 25 horsepower and are used for smaller farm tasks and mowing grass and landscaping.

传统风格拖拉机的变种包括小型的"草坪拖拉机"和功能更大、结构更结实的"手扶拖拉机"，手扶拖拉机功率通常在10-25马力，用来干农场里比较轻的活和美化景观。

It includes tractors, caterpillar threshers, walking tractors and boat tractor.

包括轮拖拉机、履带拖拉机、手扶拖拉机、机耕船。

Shandong Weifang drag Holdings Limited is the birthplace of small-wheeled tractor, but also the country's largest production base for small-wheeled tractor, a large state enterprises, mainly agricultural production wheeled tractor, With an annual output capacity of 200,000 units registered trademark "Wei drag" card.

山东潍坊拖拉机厂集团有限公司（简称山东潍拖集团有限公司）是中国小四轮拖拉机的发源地，也是全国最大的小四轮拖拉机生产基地，国家大型一类企业，主要生产农用轮式拖拉机，年产能力20万台，注册商标&潍拖&牌。

TRACTOR TRAVEL \ 拖拉机出行 People traveled by tractor-trailer through flooded streets after heavy rains in Mathura, India, Tuesday.

周二在印度马图拉，暴雨后街道严重积水，图为人们搭乘拖拉机外出。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。