Replace your brush every three to four months, sooner if it's frayed, and right after you've had a cold, flu, mouth infection or sore throat.
每三至四个月更换你的牙刷，牙刷有磨损的话就早点换，如有伤风，感冒，口腔感染或咽喉肿痛的话也应立即更换牙刷。
Therefore, not only is it recommended to replace your toothbrush every 3 months but also thoroughly rinse your brush following each use to remove any remaining toothpaste and debris.
因此，它不仅是建议更换牙刷每3个月，但也彻底冲洗你的画笔在每次使用后删除任何剩余的牙膏和碎片。
Repair or replace the electric brush; clean the commutator surface by abrasive paper and blow it clean.
修理或调换电刷，用木砂纸清理整流子表面，并吹净。
In conventional brush plating, Ni plate is used to replace Cr one, but the former is not as good as the latter in wear resistance, hardness and so on.
过去电刷镀都用镍镀层代替铬镀层，但镍镀层的耐磨性、硬度等性能不如铬镀层。
In conventional brush plating, Ni plate is used to replace Cr one, but the former is not as good as the latter in wear resistance, hardness and so on.
过去电刷镀都用镍镀层代替铬镀层，但镍镀层的耐磨性、硬度等性能不如铬镀层。
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