Assertion: blackboard eraser | /r/HasProperty | cleaned
Facets:
value: well
type: DEGREE
Source sentences:
text: The utility model has the advantages that: 1, by contacting with centrifugal block for clutch use, the dust be attached on blackboard eraser working face is split away off completely by repeatedly impacting, and blackboard eraser is well cleaned, and cleaning effect is remarkable; 2, be coated with in cleaning course automatic uniform and be covered with special cleaning agent, greatly improve the cleaning effect of blackboard eraser, blackboard also can wiped clean completely very easily, does not stay any vestige, promotes quality of instruction; 3, after the dust granules on blackboard is brought into cleaner by blackboard eraser, be collected in the dust container of cleaner, make the dust concentration in classroom greatly decline like this, thus the hygienic conditions in classroom are improved greatly; 4, automatic assembly line work, whole clean flow process only needs about 20 seconds, and cleaning efficiency is high, and structure is simple, practical, is suitable for extensively promoting in teaching environment or office building.