由于庞大的体积和重量，现在的农业机械有显著的缺点：它们会把土壤压实，降低土壤孔隙度，杀死有益的生命，这意味着农作物不会长得太好。
With their enormous size and weight, today's farm machines have significant downsides: they compact the soil, reducing porosity and killing beneficial life, meaning crops don't grow so well.
有记载的最早的重量驱动机械钟是1283年在英国贝德福德郡建造的。
The earliest recorded weight-driven mechanical clock was built in 1283 in Bedfordshire in England.
除了不需在汽车上配置传统发动机舱，由于轮毂电机不需要机械传动(一般有传动轴和差别单位)，轮毂电机能节省汽车空间并减少重量。
Besides dispensing with the traditional engine bay on a car, hub motors save space and weight because there is no need for a mechanical transmission, with its driveshafts and differential units.
电动机不需要齿轮变速箱，因此可以减轻重量和机械复杂性。
Electric motors do not need a gearbox, which reduces weight and mechanical complexity.
手表制作者们用新旧机械技术来展示老式手表的工艺，诠释着岁月的变迁和重量。
Watchmakers use old and new mechanics to perform the age-old task of measuring the passage of time.
它配备了一个机械臂，可挖周围可疑物品，举重量达十磅。
It is fitted with a manipulator arm that can dig around suspicious objects and lift items that weigh up to 10lb.
他还必须考虑到活荷载，即结构之中人、车、家具、机械设备以及在该结构投入使用时所需要承载的重量。
He must also consider the live load, the weight of all the people, cars, furniture, machines, and so on that the structure support when it is in use.
但是，即使在一个500米高的电梯中，钢索的重量也高达整个机械移动重量的四分之三。
But even so in a lift 500 metres tall steel ropes account for up to three-quarters of the moving mass of the machine.
机械外骨骼手套可以减轻工具的重量，以避免工人很快就会感觉手部酸痛。
Forming an exo-skeleton it takes the weight out of the tool and stops the worker getting aches and pains as quickly.
热镜中空玻璃具有与普通中空玻璃相似的重量，厚度和机械性能。
Heat Mirror insulating glass has similar weight, thickness and mechanical performance compare with ordinary insulating glass.
有织物机械性能的改变，诸如重量，厚度，硬度，透气，断裂强力和伸长度等性能的改变。
There are changes in mechanical properties of the fabric such as weight, thickness, stiffness, permeability, or breaking strength and elongation.
表示设计系列号等。 并且指出了承载机械与液压锤重量匹配、动力匹配的选型原则。
The selection of driving machines is discussed in weight matching and power matching principles between hammers and driving machinery.
图纸内容还应包括材料部件编号，间隙公差，表面机械加工符号，热处理信息，表面保护，材料重量，以及其他的必要内容。
Drawings will also include the material part Numbers, tolerances clearances, surface machining symbols, heat treatment information, surface protection, material weight and other necessary information.
精心的设计实现了最大的机械优势，同时因为工具的重量轻，操作人员的疲劳也降到最低程度。
The carefully engineered design achieves the absolute maximum mechanical advantage; along with the tool's light weight, operator fatigue is minimized.
在分析原有的真空箱机械强度的基础上，使用有限元方法对真空箱进行优化设计，进一步降低了产品的重量，并获得了最小壁厚尺寸，在实际应用中达到了满意的效果。
The weight of the box is optimized using FEA method, based on the mechanical strength analysis of the old one, and the minimum wall thicknesses are obtained, and are used sounded in practice.
车轮电机由于取消了齿轮和机械差动器，减小了驱动链的组件，因而减小了整个驱动链的重量，提高整个系统的可靠性和效率。
In-wheel motor reduces the components and weight of the whole drivetrain hence enhancing the reliability and efficiency of the whole system due to absence of mechanical gears.
对DDS药棒进行重量、大小、含药量、机械性能测试和抑菌实验、体外释放实验研究。
Test of weight, size, drug concentration, mechanical function and antibacterial test and in vitro release study were done to evaluate the DDS.
另外，在折弯、抗扭强度相同时，重量较轻，所以也广泛用于制造机械零件和工程结构。
In addition, the utility model has the advantages of light weight and bending strength, and is widely used for manufacturing mechanical parts and engineering structures.
电子油门用继电器取代了连接油门踏板和油门的机械装置。已被汽车行业普遍使用的电子油门系统可以降低汽车重量，减少汽车油耗。
Electronic throttles replace mechanical links between the gas pedal and the throttle with electronic relays. The systems, used widely in the industry, reduce vehicle weight and fuel waste.
由于其良好的机械性能使天花能减缓外力冲击，承载100公斤以上的重量。
Its good water tightness makes it leak free. Good mechanical performance enables the ceiling to cushion exterior impact and bear a weight as much as 100kg.
该机械运动降低变焦速度，并增 加使用于变焦系统的空间与重量，可能引起不需要的抖动且需要较大的功率消耗。
The mechanical motions decrease the speed of zooming, increase space and weight for zoom system, may induce unwanted jitter, and require large power consumption.
经理论分析和一系列试验证明，该装置能根据物体的重量控制机械手以最小而必需的力来抓取不同材料的物体。
It is shown that the body of different materials may be grasped with a necessary minimum grasping force according to the weight of the body.
接地比压视土壤机械性质、机耕船的几何尺寸和重量等因素而定。
The ground pressure depends upon the mechanical properties of soil and the geometry and weight of the machine.
改变了继电器控制系统中机械式的鼓形控制器或凸轮控制器步数和输出点数有限、体积大、重量大、成本高的缺点。
It changes the disadvantage that drum or CAM controller in relay control total steps, output points are limited, large volume and weight, high costing.
大功率LED灯体积小、重量轻，环氧树脂封装，可承受高强度机械冲击和震动，不易破碎。
High power LED Lamp is characterized by small volume, light weight, epoxy resin packaging, good impact resistance and unbreakable property.
压缩机是一种常用的机械设备，滚动转子式压缩机以其体积小、重量轻、高效率、高可靠性等特点被广泛应用于冰箱、空调等家电设备。
Rotary compressor has many features such as small size, light weight, high efficiency and high reliability and is widely used in residential equipments such as refrigerator, air conditioner and so on.
研究结果表明，既考虑等强度条件又考虑可靠性要求，是使机械体积或重量达到最小的最有效的优化途径。
The results show that combinig equi strength conditions and reliability requirement together is one of the most efficient methods that can minimize the volume or weight of the mechanism.
同轴直接式构造，效率高，体积小，重量轻，安装保养容易。6.采用机械密封，使用寿命长。
Direct coaxial structure, high efficiency, small size, light weight, installation and maintenance easy. 6. Mechanical seal, long service life.
叙述机械设计过程中，如何根据材料强度、刚度与密度之间的相对关系，合理选择材料，以减轻机械构件的重量。
In this paper it is discussed how the material should be reasonably selected in machine design according to its strength, stiffness and density, so that the weight of machine parts can be lighten.
铝铜合金由于重量轻、机械强度高而得到广泛应用。 然而，由于铜的存在使铝铜合金的演技氧化变得困难。
Aluminum-copper alloy has been widely adopted for its low weight and high mechanical strength, but the existence of copper makes the anodizing of aluminum-copper alloy difficult.
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