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Under standard mass limits, what is the maximum load on a stand-alone twin-tyred single axle, within tyre and axle ratings? Exclude multi-axle sets and permits.
标准质量限制下，独立双轮胎单轴在不超过轮胎及车轴额定值时，上限是多少？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。