正面放映 meaning in Chinese

Front projection equipment - method for measuring screen illumination
正面放映设备.银幕照度测量方法
Cinematography - projector usage of 8 mm type s motion - picture film for direct front projection
电影技术.直接正面放映用8mms型电影胶片放映机的用法
Cinematography - projector usage of 16 mm motion - picture films for direct front projection - specifications
电影技术.直接正面放映16mm电影放映机的使用.规范
Cinematography - projector usage of 8 mm type r silent motion - picture film for direct front projection - specifications
电影技术.直接正面放映的8mmr型电影胶片放映机的使用.规范