A dust collection member filters off dust included in the air flowing into the cover member through the influent hole by the air current generated in the cover member.
集尘构件过滤掉由在盖构件中产生的气流引起的通过流入孔流入盖构件中的空气里包含的灰尘。
A dust collection member filters off dust included in the air flowing into the cover member through the influent hole by the air current generated in the cover member.
集尘构件过滤掉由在盖构件中产生的气流引起的通过流入孔流入盖构件中的空气里包含的灰尘。
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