求翻译：Under normal circumstances, special trucks in summer and winter seasonal cleaning and maintenance should be a normal driving every 6 months to 8 months of cleaning and maintenance time, or in case the water temperature is too high, leakage, cleaning and maintenance when a boil. Clear traces of lead to engine overheating and scale to prevent the occurrence of harmful corrosion, avoid and stop the leakage of seals and tanks, completely replacing the old coolant.是什么意思？

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