字幕片 meaning in Chinese

overhead transparency

Slide projectors and slides ; overhead projectors ; transparent films , transparencies , projection aids
幻灯放映机和幻灯片.字幕片放映机.第17部分:透明胶片
Slide projectors and slides ; overhead projectors ; aperture area , location pins , projection screens , evaluation
幻灯放映机和幻灯片.字幕片放映机.第7部分:孔径区
Evaluation of still projectors with incandescent lamps ; measurement of temperature in the projection area of overhead projectors
白炽灯幻灯放映机的评价.第3部分:字幕片放映机投影区