| Hom | Hom | Siv tau |
| Canny | Dav Dav | Canny escalator |
Thaum txhim kho lub hau nkag ntawm lub escalator, xyuas kom tseeb tias nws qhov kev sib txuas rau lub platform escalator nruj thiab tiaj tus kom tsis txhob muaj kev pheej hmoo ntawm cov neeg taug kev lossis ntog. Tsis tas li ntawd, lub hau nkag thiab tawm yuav tsum muaj tus qauv tsim los tiv thaiv kev nplua kom ntseeg tau tias cov neeg taug kev muaj kev nyab xeeb thaum mus ncig hauv qhov xwm txheej nplua lossis thaum lub sijhawm coob coob.
Kev tswj thiab ntxuav cov ntaub thaiv qhov rooj nkag thiab tawm yog ib qho tseem ceeb uas yuav tsum tau ua kom cov ntaiv nce thiab tawm ua haujlwm tau zoo thiab muaj kev nyab xeeb rau cov neeg caij tsheb. Kev ntxuav thiab tshuaj xyuas cov ntaub thaiv qhov rooj tsis tu ncua, thiab hloov cov ntaub thaiv uas puas lawm lossis puas lawm sai sai, tuaj yeem ua rau lawv siv tau ntev dua thiab tiv thaiv tau cov teeb meem kev nyab xeeb.