During the welding process, the computer will modify the position of the electron gun based on the deviation to make the electron beam spot centered on the annular weld groove.
在焊接时利用处理后的偏差值在圆形焊缝相应位置不断修正电子枪的位置，从而达到电子束束斑与焊缝自动对中的目的。
Constant deviation prism is a turning element which can invariably transform the propagating direction of the light beam.
恒偏向棱镜是指能恒定改变光束传输方向的转向元件。
Belt grinder adopted a technology of floatable beam, moreover, belt can be tensioned flexibly and the deviation can be adjusted quickly.
磨削机采用了浮动横梁技术，能实现砂带的柔性张紧和快速调偏。
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