Tools Holder Locking Device / Tools Lock Seat.
锁刀座又叫拆刀器、BT双头锁刀座，是用于CNC、机床刀柄锁定的一种机床附件。

Caliper(s) or calliper(s) are an instrument used to <a href="https://en.wikipedia.org/wiki/Measurement" target="_self">measure</a> the dimensions of an object; namely, the diameter or depth of a hole. The word “Caliper” comes from latin roots meaning precise pincer.<a href="https://en.wikipedia.org/wiki/Calipers#cite_note-1" target="_self">[1]</a><a href="https://en.wikipedia.org/wiki/Calipers#cite_note-2" target="_self">[2]</a><a href="https://en.wikipedia.org/wiki/Calipers#cite_note-3" target="_self">[3]</a>
Many types of calipers permit reading out a measurement on a ruled <a href="https://en.wikipedia.org/wiki/Scale_ruler" target="_self">scale</a>, a <a href="https://en.wikipedia.org/wiki/Dial_(measurement)" target="_self">dial</a>, or an electronic <a href="https://en.wikipedia.org/wiki/Digital_display" target="_self">digital display</a>. A common association is to calipers using a sliding <a href="https://en.wikipedia.org/wiki/Vernier_scale" target="_self">vernier scale</a>.
Some calipers can be as simple as a <a href="https://en.wikipedia.org/wiki/Compass_(drafting)" target="_self">compass</a> with inward or outward-facing points, but with no scale (measurement indication). The tips of the caliper are adjusted to fit across the points to be measured, and then kept at that span while moved to separate measuring device, such as a <a href="https://en.wikipedia.org/wiki/Ruler" target="_self">ruler</a>.
Calipers are used in many fields such as <a href="https://en.wikipedia.org/wiki/Mechanical_engineering" target="_self">mechanical engineering</a>, <a href="https://en.wikipedia.org/wiki/Metalworking" target="_self">metalworking</a>, <a href="https://en.wikipedia.org/wiki/Forestry" target="_self">forestry</a>, <a href="https://en.wikipedia.org/wiki/Woodworking" target="_self">woodworking</a>, <a href="https://en.wikipedia.org/wiki/Science" target="_self">science</a> and <a href="https://en.wikipedia.org/wiki/Medicine" target="_self">medicine</a>.&nbsp;

Caliper / Digital Caliper / 卡尺 / 游标卡尺

Dial indicators can be defined as the small measuring instrument that can be used in several mechanical means to measure a certain deviation of a mechanical component. 
千分表是通过齿轮或杠杆将一般的直线位移（直线运动）转换成指针的旋转运动，然后在刻度盘上进行读数的长度测量仪器，千分表是精密测量中用途很广的指示式量具。

A Drill Chuck is a specialized type of <a href="https://en.wikipedia.org/wiki/Clamp_(tool)" target="_self">clamp</a> used to hold an object with <a href="https://en.wikipedia.org/wiki/Rotational_symmetry" target="_self">radial symmetry</a>, especially a <a href="https://en.wikipedia.org/wiki/Cylinder_(geometry)" target="_self">cylinder</a>. In a <a href="https://en.wikipedia.org/wiki/Drill" target="_self">drill</a> or a <a href="https://en.wikipedia.org/wiki/Milling_(machining)" target="_self">mill</a>, a chuck holds the rotating <a href="https://en.wikipedia.org/wiki/Tool_bit" target="_self">tool</a>; in a <a href="https://en.wikipedia.org/wiki/Lathe" target="_self">lathe</a>, it holds the rotating workpiece. 
夹头被称之为弹性夹头或者是<a href="https://baike.baidu.com/item/%E7%AD%92%E5%A4%B9/6636827" target="_blank">筒夹</a>。是一种用来装置在<a href="https://baike.baidu.com/item/%E9%93%A3%E5%BA%8A/474434" target="_blank">铣床</a>上的一种用来禁锢钻头或者是铣刀的一种筒形的<a href="https://baike.baidu.com/item/%E5%A4%B9%E5%85%B7/5481848" target="_blank">夹具</a>。也是一种用来固定加固需要改造的零件的一种固定装置。

Edge Finder also known as a wobbler, edge-finder, center-finder or laser-centering-device, is a tool used with a machine like a <a href="https://en.wikipedia.org/wiki/Milling_machine" target="_self">mill</a>, to accurately align the machine head with the work prior to machining. 
寻边器是在数控加工中，为了精确确定被加工工件的中心位置的一种检测工具。寻边器的工作原理是首先在X轴上选定一边为零，再选另一边得出数值，取其一半为X轴中点，然后按同样方法找出Y轴原点，这样工件在XY平面的<a href="https://baike.baidu.com/item/%E5%8A%A0%E5%B7%A5%E4%B8%AD%E5%BF%83/474705" target="_blank">加工中心</a>就得到了确定。

A collet <a href="https://en.wikipedia.org/wiki/Help:IPA/English" target="_self">/ˈkɒlɪt/</a> is a subtype of <a href="https://en.wikipedia.org/wiki/Chuck_(engineering)" target="_self">chuck</a> that forms a <a href="https://en.wiktionary.org/wiki/collar" target="_self">collar</a> around an object to be held and exerts a strong clamping force on the object when it is tightened, usually by means of a <a href="https://en.wikipedia.org/wiki/Machine_taper" target="_self">tapered</a> outer collar. It may be used to hold a <a href="https://en.wikipedia.org/wiki/Workpiece" target="_self">workpiece</a> or a tool.

Milling R8 Collet Chuck 铣床R8弹簧夹头

Roller burnishing is a surface finishing technique where hardened rollers cold work surface imperfections to reduce surface roughness.
滚压刀是利用机械挤压的原理，获得光洁如镜的金属表面的一种机械无切削的塑性加工方法。

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。

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