Lub elevator yog dab tsi?
Apr 14, 2022
Kev ua haujlwm of the elevators yog cov cuab yeej siv ua haujlwm ntau lub tshuab nqa khoom uas tuaj yeem muab faib ua cov khoom siv ruaj khov thiab cov khoom siv txawb, qhia kev tsheb nqaj hlau, hom nkhaus caj npab, txiab diav rawg hom, saw hom, thauj khoom thiab tshem tawm platform, thiab lwm yam.
Cov elevator feem ntau yog siv rau kev cawm thiab kho dua tshiab.
