Gas deviation factor being a very important parameter in gas engineering calculation was calculated by use of empirical formulas in general.
天然气偏差因子是天然气工程计算中一项相当重要的参数，该参数普遍采用相关经验公式计算。
The diameter of actual tangent circle is an important parameter for safety of boiler, the residual rotation is the key factor of flue gas temperature deviation at furnace exit.
实际切圆直径是锅炉稳定安全运行的一个重要参数，炉膛出口残余旋转是造成烟温偏差的主要原因。
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