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16mm电影放映机间歇齿轮齿形、主要尺寸和精度
Intermittent sprockets for 16mm motion-picture projectors-tooth profiles,dimension and precision
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16mm电影放映机输片齿轮齿形、主要尺寸和精度
Sprockets for 16mm motion-picture projectors-tooth profiles,dimension and precision
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电影放映物镜性能测定方法
Method for determining various functions of motion-picture projection lenses
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35mm电影放映变形附加镜.技术条件
Technical specification of anamorphic attachment for 35mm film projection
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电影放映物镜鉴别率检验标板
Resolution test target for film projection lens
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35mm和70mm电影放映机反光镜 技术条件
Technical specification of 35mm and 70mmmotion-picture projectors viewfinders
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70mm电影放映机 技术条件
Technical specifications of 70mm motion-picture projectors
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幻灯放映物镜
Slide projection lens
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70mm电影放映机片夹 尺寸
Reels for 70mm motion picture projectors. Dimensions
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