应用领域：大中专院校，中小学多媒体教室，阶梯教室，普通教室，会议室，演播厅，以及各种培训教室，报告厅，等等；

Areas of application: colleges, multimedia classroom of primary and secondary schools, amphitheatre, ordinary classroom, meeting room, studio, as well as a variety of training rooms, lecture hall, etc.;