... 焦-片距（focus-film distance） 双窗技术（duble window technology） 重叠扫描（overlap scanning） ...
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focus-to-film distance 焦距 ; 焦点 ; 焦一片距
focus-film distance lock pin 胶片距离固定钉
focus to film distance 焦点至底片距离
以上来源于: WordNet
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。
Purpose To establish a screen film system sensitometric method of X ray scale exposure by changing the distance between focus and film.
目的建立以焦点胶片距离的改变，取得X线阶段曝光的屏片体系感光测定方法。
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