取度胶片剪成2cm×0.5cm长条对折成45度角,一半粘在取胶片方便的暗盒角的增感纸后方;另一半留在增感纸上面。当装上胶片时关上暗盒,弹片被压在胶片的后方,打开暗盒时,胶片即自动弹起。我科已进行万次以上的弹性试验,弹性效果不变。弹片在摄好的胶片上留下0.5cm痕迹,剪胶片角对可 Degree of film cut into 2cm × 0.5cm strip folded into a 45-degree angle, one half sticky film to take the convenience of the corner of the film after the sensitized paper; the other half to stay in sensitized paper. When the film is loaded, the film cassette is closed and the film is pressed to the rear of the film. When the film is opened, the film automatically bounces. Our department has carried out more than ten thousand times flexible test, the same flexibility. Shrapnel in the good film leaving 0.5cm traces, cut the film angle can be