晚清民国早期,电影放映机,美国贝尔公司出厂制造老式电影放映机,“哒哒哒”的映带播放声,看着滚动着的影片胶带和投影屏幕上的电影,仿佛放映着那个年代的情景。这种电影放映机都是由输片、放映光学、还音、动力传动和电路等五部分组成。放映机的输片部分,由输片齿轮、滑轮、片门、画幅错格调节器、间歇运动机构、遮光器及供、 Early in the Republic of China late in the Republic of China, the movie projector, the United States Bell factory manufactured the old-fashioned movie projectors, “da da da ” of the video playback, watching the rolling tape and video projection screen, as if showing that era scene. This film projector is by the film, projection optics, but also sound, power transmission and circuit composed of five parts. Film projector part of the film by the sprocket, pulley, film doors, frame format error regulator, intermittent movement agencies, shading and for,