Assertion: electronic blackboard eraser | /r/CapableOf | collect powder
Facets:
value: during erasing the blackboard
type: TEMPORAL
Source sentences:
text: By means of the construction set forth above, the electronic blackboard eraser of the invention can effectively adsorb and collect dust and powder incurred during erasing the blackboard and prevent the dust and powder from dispersing in the air to protect people's health.