| 摘要 |
PURPOSE: A board eraser is provided to inhale the chalk dust and dust and collects in a storage by attaching and detaching a first case and a second case. CONSTITUTION: A board eraser comprises: a case having a cloth mounted on the lower part and an intake cavity(111) and a discharge hole(121); a motor(520) installing inside the case; a switch operating the motor; a fan(540) installing inside the case and connected to the motor; and a filter installing to the lower part of the motor, and arranged between the intake cavity and discharge hole(400).
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