Disclosed are: a caster mounted on a teaching aid including a whiteboard, or furniture, etc. so as to conveniently and stably convert between a movement state and a stopping state; and a whiteboard including the caster. The caster is mounted on a pedestal fixed to the lower end of a column frame on which the whiteboard is mounted.
Caster and whiteboard comprising caster
2018-03-06
Patent
Electronic Resource
English
CASTER, CARRIAGE, BAG WITH CASTER AND INSTRUMENT WITH CASTER
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