结点尺寸引起的误差一般可忽略。
The errors introduced by the finite sizes of the contacts can be generally neglected.
辐射误差及气温涨落的影响被补偿至可忽略程度。
The error due to radiation and air temperature fluctuation is compensated to negligible degree.
由于地基是事先选好的，多采取钢筋混凝土结构，经纬仪借助于地基环固定在地面上，工作时带动误差非常小，可忽略不计。
Because groundwork adopting ferroconcrete structure is chosen in advance, drive error of theodolite working on it is very little and can be ignored.
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