The main purpose of bearings is to prevent direct metal to metal contact between two elements that are in relative motion. This prevents friction, heat generation and ultimately, the wear and tear of parts. It also reduces energy consumption as sliding motion is replaced with low friction rolling

A brush or carbon brush is an electrical contact, often made from specially prepared carbon, which conducts current between stationary and rotating parts of an electrical machine. Typical applications include electric motors, alternators and electric generators.&nbsp;

A control system manages, commands, directs, or regulates the behavior of other devices or systems using control loops. It can range from a single home heating controller using a thermostat controlling a domestic boiler to large industrial control systems which are used for controlling processes or machines. 
控制系统是指用<a href="https://zh.wikipedia.org/wiki/%E6%8E%A7%E5%88%B6%E8%BF%B4%E8%B7%AF" target="_self">控制回路</a>管理及控制另一个设备或是系统的系统，控制系统可以小到家中用<a href="https://zh.wikipedia.org/wiki/%E8%87%AA%E5%8B%95%E8%AA%BF%E6%BA%AB%E5%99%A8" target="_self">自动调温器</a>实现的温度控制器，也可以大到控制制程或是机器的大型<a href="https://zh.wikipedia.org/wiki/%E5%B7%A5%E6%A5%AD%E6%8E%A7%E5%88%B6%E7%B3%BB%E7%B5%B1" target="_self">工业控制系统</a>。

Controller / DRO Spare Parts 数控 与 光栅 配件

【JR1A】【JR2A】【JR3A】【JR3B】【MPSS-4】【CutCool SS320】【SDK-118】【JR3C】【DX-2】【DIC-206】【Coolant Block】

Cutting Coolants / Cutting Fluid ( 冷却液 / 切削液 )

In engineering practice, the distinction between electrical engineering and electronics is usually based on the comparative strength of the <a href="https://www.britannica.com/science/electric-current" target="_self">electric currents</a> used. In this sense, electrical engineering is the branch dealing with “heavy current”—that is, electric light and <a href="https://www.britannica.com/technology/electric-power" target="_self">power</a> systems and apparatuses—whereas electronics engineering deals with such “light current” applications as <a href="https://www.britannica.com/technology/telephone" target="_self">telephone</a> and <a href="https://www.britannica.com/technology/radio-technology" target="_self">radio</a> communication, <a href="https://www.britannica.com/technology/computer" target="_self">computers</a>, <a href="https://www.britannica.com/technology/radar" target="_self">radar</a>, and automatic <a href="https://www.britannica.com/technology/control-system" target="_self">control</a> systems. 
电子电器，全部或主要部分由电子器件和电子线路构成的电器元件或装置的总称。如接近开关、晶体管温度继电器、同步接触器等。在信号检测、故障监视与保护等环节上优先实现电子化,而通断强电的操作则较多由有触点电器完成,由于自关断器的发展,很多已由诸如晶闸管、<a href="https://baike.baidu.com/item/%E7%BB%9D%E7%BC%98%E6%A0%85%E5%8F%8C%E6%9E%81%E5%9E%8B%E6%99%B6%E4%BD%93%E7%AE%A1/12731336" target="_blank">绝缘栅双极型晶体管</a>来完成。

The word "Hydraulics" originates from the Greek word ὑδραυλικός (hydraulikos) which in turn originates from ὕδωρ (hydor, Greek for <a href="https://en.wikipedia.org/wiki/Water" target="_self">water</a>) and αὐλός (aulos, meaning <a href="https://en.wikipedia.org/wiki/Plumbing" target="_self">pipe</a>). 
Lubricating oils are commonly used to reduce friction and wear and optimize the life of PT components such as bearings and gears. … In such applications, oil lubrication can wash the contaminants away from the bearings. Lubricating oils also serve as heat transfer fluids. 
机械式的液压<a href="https://baike.baidu.com/item/%E5%8A%A8%E5%8A%9B%E8%BD%AC%E5%90%91/4304821" target="_blank">动力转向</a>系统一般由<a href="https://baike.baidu.com/item/%E6%B6%B2%E5%8E%8B%E6%B3%B5/9636281" target="_blank">液压泵</a>、<a href="https://baike.baidu.com/item/%E6%B2%B9%E7%AE%A1/2719431" target="_blank">油管</a>、压力<a href="https://baike.baidu.com/item/%E6%B5%81%E9%87%8F%E6%8E%A7%E5%88%B6" target="_blank">流量控制</a>阀体、V型传动皮带、储油罐等部件构成。它诞生于1902年，也就是说已经有了百年历史。由于技术成熟可靠，而且成本低廉，得以被广泛普及。 
机床润滑包括<a href="https://baike.baidu.com/item/%E8%BD%B4%E6%89%BF/177492" target="_blank">轴承</a>、<a href="https://baike.baidu.com/item/%E9%BD%BF%E8%BD%AE/81352" target="_blank">齿轮</a>、<a href="https://baike.baidu.com/item/%E5%AF%BC%E8%BD%A8/4469954" target="_blank">导轨</a>和顶尖的<a href="https://baike.baidu.com/item/%E6%B6%A6%E6%BB%91/554802" target="_blank">润滑</a>；机床润滑油脂包括：液压油、<a href="https://baike.baidu.com/item/%E6%B6%B2%E5%8E%8B%E5%AF%BC%E8%BD%A8%E6%B2%B9/6031403" target="_blank">液压导轨油</a>和润滑油(脂)，不同的机床种类及工况的不同对润滑油品的性能有不同的要求。

Hydraulic & Lubrication 油压 液压 润滑

Machine - an apparatus using mechanical power and having several parts, each with a definite function and together performing a particular task. 
机械就是能帮助人们节省工作难度或省力的工具装置。有一些机械单纯转换力的大小或（及）方向，被称为简单机械。

气动元件通过<a href="https://baike.baidu.com/item/%E6%B0%94%E4%BD%93/254432" target="_blank">气体</a>的压强或膨胀产生的力来做功的元件，即将压缩空气的弹性能量转换为动能的机件。 
Pneumatics is the technology of compressed air, but in some circles, it is more fashionable to refer to it as a type of automation control.

A magnet is a material or object that produces a <a href="https://en.wikipedia.org/wiki/Magnetic_field" target="_self">magnetic field</a>. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other <a href="https://en.wikipedia.org/wiki/Ferromagnetic_material" target="_self">ferromagnetic materials</a>, such as <a href="https://en.wikipedia.org/wiki/Iron" target="_self">iron</a>, <a href="https://en.wikipedia.org/wiki/Steel" target="_self">steel</a>, <a href="https://en.wikipedia.org/wiki/Nickel" target="_self">nickel</a>, <a href="https://en.wikipedia.org/wiki/Cobalt" target="_self">cobalt</a>, etc. and attracts or repels other magnets.&nbsp;

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