leveling-adjustment foot
/ˈlɛvəlɪŋɐdʒˈʌstmənt ˈfʊt/
n
English · leveling-adjustment foot中文 · 调平脚Español · pata de ajuste de alturaFrançais · réglage en hauteur
意味：Device that adjusts the position of the slide projector so that the image is centered on the screen.