求翻译：所以在适当的保养周期，我们建议将喷油嘴拆下进行清洗工作，这样可以内外兼顾，既可以将内部存留杂质清除，也可以将喷油嘴头部附着的积碳清除。了解相关清洗工作的朋友可能会质疑，免拆清洗是用高压空气将清洗液来顶入气缸，使其代替汽油来维持发动机的运转。是什么意思？

So, in the proper maintenance cycle, we recommend that the nozzle will be removed for cleaning, so you can both inside and outside, either clear the internal retention of impurities, can also clear the nozzle head attached to the carbon deposition. Understanding of the relevant cleaning work friends