调换电刷：电刷磨损到不能使用时应立即调换，否则会损坏换向器，严重时更容易导致烧坏电机。
Replacement brush: brush wear should not be used to change immediately, otherwise damage the commutator, more easily cause serious electrical burn.
无刷直流电机是一种没有机械换向器和电刷的直流电机。
The no-brush direct current electromotor is a kind of direct current electromotor without any mechanical commutator or brush.
轨道36设于凹槽21内，用 于引导电刷20至换向器，且电刷在一预先确定的运动范围内可沿所述轨道自 由滑动。
The tracks 36 are arranged in the grooves 21 and are used for guiding the electric brush 20 to the reverser, and the electric brush can slide freely along the tracks in a predetermined movement range.
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