查询词典 tractor

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。

Tractors used in the experiments were wheel tractor, crawler tractor and holder/ walking tractor. The influence of soil compaction on wheat growth and soil structural discontinuity was discussed.

试验所使用的耕作机械包括轮式、履带式和手扶式三种拖拉机，分析了土壤压实对小麦生长以及土壤结构不连续性的影响。

In the experiments, soil was tilled by rotary tiller at the depth of 10 cm, and compacted by holder/ walking tractor, wheel tractor and crawler tractor in one pass (T1), two passes (T2) and four passes (T3), while no compaction (T4) was applied as control.

试验中，先用旋耕机对田块进行旋耕，耕深10 cm，然后使用手扶式、轮式、履带式拖拉机在旋耕后的田块中通过1次（T1）、2次（T2）、4次（T3）以对土壤进行压实处理，对照组（T4）不作任何压实处理。

Pressure crawler tractor tire wheel tractor towing machine.

气压履带式牵引机。轮式牵引机。轮带式牵引机。

The Double Eagle brand products are exported through Beijing, Shanghai, Guangzhou, Jiangsu ,Shandong etc. Main products: a series of x-ray protected products, a series of x-ray protected device products; one-off medical plastic instrument mutilated machine, vertebrae tractor, medical bed style air cushion, medical oxygen bag, medical air cushion, food tractor etc. The medical instruments are sold all over the country.

公司生产的双鹰牌防护系列产品通过北京、上海、广州、江苏、山东等外贸批量出口，打入国际市场，主要产品有：X射线防护铅胶系列产品；X射线防护装置系列产品；一次性医用塑料器具毁形机、柔软型颈椎牵引器、医用床式气垫、医用氧气袋、医用气垫、脚踏吸引器等医疗器械产品，产品畅销全国各地。

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

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。

The conclusion is that the maximal gradient: of the tractor skidding trail depends on: the adhesive force while the tractor is uphill without load, when the full loaded tractor is downhill using the engine to brake the tractor and control the tractor velocity, the reliable lubrication of the engine.

结论是：规范关于集材坡道最大坡度的规定，主要由空车上坡时附着力、重载下坡时利用发动机制动且变速器挂低档控制拖拉机下滑速度及保证发动机可靠润滑等因素决定。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。