Maka nkwenye ngwaahịa, biko nye wheel escalator akara, ụdị na nha nke escalator.
A na-ebufe wiil escalator n'igbe osisi ma ọ bụ okpokolo agba osisi; ọ bụrụ na ị nwere mkpa pụrụ iche, biko kpọtụrụ ndị ahịa.