When estimated by inherent standard deviations of GPS receivers, the accuracy of lateral piercing can also meet the needs of a horizontal tunnel control network.
2
气象代表性误差是光电测距的主要误差来源，也是实现精密全站仪标称精度的主要障碍之一。
The meteorological representative error is the main source of EDM error, as well as the main obstruct to realize the nominal accuracy of the precision electronic tachometer also.
3
采用酚试剂比色法并合理使用甲醛测量装置对甲醛含量进行了测定，测量结果的精度能够达到装置标称的5%。
We use of colorimetric phenol reagent and formaldehyde measurement devices for measuring formaldehyde, the accuracy of the measurement results can reach nominal 5% of the device.
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