后盖打开
Open the back cover and push down the release pin on the back cover to remove.
打开后盖,按下后盖上释放针,以便卸下后盖。
While pressing the back cover lock release button, slide the back cover latch down and open the back cover.
按后盖锁定释放按钮,同时向下滑动后盖插锁,以打开后盖。
Open the back cover to check the electric brush is in good condition.
打开后盖外罩,检查电刷是否正常。
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