Besides, the reliability of observed results is subject to the precision of observation.
为了保证观测结果的可靠性，必须对其进行精确观测。
The factors of influences precision of observation data are mainly instrument failure, water level, atmospheric pressure and air temperature.
影响观测资料精度的主要因素是仪器故障、水位、气压、气温等；
The result of analysis shows that this instrument is entirely free of the effect of personal equation, and the precision of observation is high.
分析结果表明，新仪器完全消除了人差的影响，观测精度是良好的。
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