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。
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。
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.
水份从阴极附近通过沉积过程排斥出来，引起涂膜脱水，这种涂膜已具有抗物理变形性。
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