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Positioning element Positioning element is a component used to determine the correct position of the workpiece. The positioning base surface of the workpiece to be machined is in direct contact with or matched with the positioning element of the fixture.

Clamping device Clamping device is a device that enables the workpiece to maintain its correct positioning position under the action of external forces.

Tool element, guide element, guide element refers to the fixture used to determine (or guide) the tool relative to the fixture positioning element has the correct position of the element, such as drill sleeve, boring set, tool block, etc.

连接元件夹具连接元件是指用于确定夹具在机床上具有正确位置并与之连接的元件，例如安装在铣床夹具底面上的定位键等。

其它元件及装置根据加工要求，有些夹具尚需设置分度转位装置、靠模装置、工件抬起装置和辅助支承等装置。

夹具体夹具体是用于连接夹具元件和有关装置使之成为一个整体的基础件，夹具通过夹具体与机床连接。

定位元件、夹紧装置和夹具体是夹具的基本组成部分，其它部分可根据需要设置。