N-COUNT 链轮;(胶片的)输片齿轮;(磁带的)带齿卷盘 A sprocket is a wheel with teeth around the outer edge that fit into the holes in a chain or a length of film or tape in order to move it round. 链轮;(胶片的)输片齿轮;(磁带的)带齿卷盘