Thyssen cov kauj ruam txhuas hlau peb sab yas thav duab escalator kauj ruam

Rau kev lees paub cov khoom, thov muab lub hom ntaiv escalator, qauv, pem hauv ntej thiab nraub qaum, qhov dav ntawm ntaiv, qhov loj ntawm lub log ntaiv; Cov hom Japanese yuav muab cov ces kaum ntawm lub ntaiv (Hitachi, Thyssen, Mitsubishi, Sigma, Fuji, Hyundai)