精校机液压位置伺服系统是精校机的执行环节，是决定工件加工精度的关键部分。
Hydraulic position servo system of the precise straightening machine is the executive body and is the key unit to decide the processing precision of the workpiece.
激光光斑位置的准确确定是决定测量系统精度高低的关键因素，所以激光光斑中心的定位就显得尤为重要。
Laser spot center detection is the key factor for evaluating a surveying system, so that the calculation of the laser spot center must be tarnally important.
在空间相机中，对地面像元分辨力起基础决定性作用的光学元件是主镜。主镜作为空间相机中质量最大的光学元件，其面形精度、位置精度要求十分严格。
In the space camera, the most crucial optical component that affects the spatial resolution is the primary mirror, so the requirements of its surface figure and position precision are very strict.
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