放大尺是利用平行四边形原理，用4根木尺制成平行四边形状的、可用来放大绘制图画、地图的简单仪器。
利用比例阀和线性光栅尺配合使用替代伺服放大器和伺服电机实现进给轴的闭环控制。
This paper give an advice that we can realize closed cycle control of feeding shaft by proportional valve and linear grid ruler instead of servo amplifier and servo motor.
使用放大镜、针规和千分尺检查模具的磨损程度。
Inspects worn dies to ascertain extent of wear, using loupe, steel gauge pins, and micrometer.
随后，依据最少的实地控制，将平行影像放大到给定比例尺数字城市中。
Then, using the least control condition, the parallel images can be magnified to the scaled image.
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