Thov nco ntsoov tiv tauj cov neeg siv khoom kom paub meej cov hom lossis cov khoom ua ntej kev yuav khoom; peb tuaj yeem muab kev qhia rau kev xaiv cov khoom.
Escalator sensor & hloov yog feem ntau xa tawm hauv cov thawv ntoo; yog tias koj muaj kev xav tau tshwj xeeb, thov hu rau cov neeg siv khoom.