Conclusion: Considering the absorbed dose of the patients and avoiding the image distortion, it is suggested that the selection of focus-film distance should be matched with the tube and grid.
结论：考虑病人的吸收剂量和避免影像失真，摄影焦-片距的选择应与滤线栅的焦距相匹配。
2
High precise concentric gear and steel roller for removing film, which can avoid skid, distortion and clearance.
精选高精度同心滚齿钢轮铜乡里撕膜，具有不易打滑、不易脱齿、不易变形、超长无间距特点。
3
Water is driven from the vicinity of the cathode through the deposited film, causing the dehydration of the film. Such a film is relatively resistant to physical distortion.