Yog tias koj xav paub meej tias cov khoom yog dab tsi, thov qhia tus qauv thiab hom ntawm lub escalator board. Txhawb nqa ntau yam kev pab cuam thiab cov txheej txheem flashing.
KONE escalator A4 board ECO-501 KM5233331G01. Yog tias koj xav tau cov ntaub ntawv ntxiv, thov hu rau peb.