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On an ordinary goods truck, not a public transport service bus, what is the standard maximum mass on a stand-alone twin-tyred single axle, within tyre and axle ratings? Exclude multi-axle sets and permits.
在普通货运卡车（不是公共交通服务巴士）上，独立双轮胎单轴的标准质量上限是多少？不超过轮胎和车轴额定值，且不涉及多轴组或特别许可。
The standard maximum for the stand-alone twin-tyred single axle described is 8,200 kg, within tyre and axle ratings.
题中普通独立双轮胎单轴，质量上限为8200公斤，并须不超过轮胎和车轴额定值。
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This question excludes multi-axle sets, HPMV and other permits. Lower vehicle, road or other applicable limits still govern the actual permitted mass.
本题不涉及多轴组、HPMV或其他许可；实际允许质量还受车辆及道路等更低限制约束，不能只套用一个轴重数值。