For an a mode biometric probe, ultrasonic beam orientation, measuring position and speed setting ensured the precision of the measurement.
对于A型生物测量探头，通过在声束定向、测量位置和声速设置等方面的设计思想，有效提高测量精度。
In practical measurement, the positioning precision of position sensitive detector (PSD) is greatly affected by the size and asymmetry of the spot.
在实际测量中，由于光斑具有一定尺寸和不对称性，在很大程度上影响了位置敏感探测器(PSD)的定位精度。
It is difficult to achieve the precision measurement of the position of the micro holes with traditional methods.
微小孔系的精密测量用传统的手段是难以实现的。
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