The formula reflects three main factors affecting acidity, Its form simple and convenient for the use.
此式反映了影响酸强度的三个主要因素，形式简单，便于应用。
Taking three-axle vehicle as an example, the calculation formula of parking grade limit of multi-axle vehicle is derived with its influencing factors analyzed.
以三轴汽车为例，推导出多轴汽车的驻车极限坡度计算公式，并对其影响因素进行分析。
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