采用优质高频率电动机及无碳刷电极，无须维护，使运行安静而平稳，转速高达13500RPM，噪音小于60DB。

Adopt high-frequency motor and inverter , it makes operation smooth and quiet. The RPM reach to 13500RPM. The noise is less than 60DB.

youdao

先拆下电动机的护罩、滑环、碳刷、刷盒、刷盒支架及短路环装置(有的电机无短路环装置)等全部零件。

Removing all parts of cover, rings, carbon brush, brush box, brush box shell and short circuit ring equipment (some motor have no short circuit ring equipment).

youdao