F. board side seal shall be on the water, air and dust are deeply however.
板端的密封应当对水，空气和尘埃是透不过的。
The fanned air is then discharged from the front side of the base, blowing off saw dust on a cutting object so as to prevent dust from accumulating on a marking line on the cutting object.
扇动空气从底板的前端向前吹出，吹掉切割对象上的锯屑，从 而防止锯屑聚集在切割对象上的标记线上。
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