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.
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.
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