主要业务为铁路车辆清洗及铁路货物装卸两项业务。
It mainly engages in rail vehicle cleaning and rail cargo handling.
当然这也取决于你居住的环境以及车辆是否停在车库以及平时如何清洗维护。
It depends heavily on the climate in which you live and whether or not your vehicle is garaged.
因此，洒水车的三通滤网的滤芯是需要定期进行清洗的，特别是经常在野外进行取水的车辆，更应加大清理频率。
Therefore, the three pass filter of the filter is the need for regular cleaning of the filter, especially in the field of vehicles often carried water, but should increase the frequency of cleaning.
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