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摄影用光平衡玻璃滤光镜
Photographic light-balancing glass filters
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摄影用玻璃滤光镜通用规则
General specification for photographic glass filters
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摄影用色滤光镜
Photographic colour filters
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透射式投影器投影片和投影片框尺寸
Overhead projectors-transparencies and transparency frames -- Dimensions
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照相机用三脚架
Tripods for cameras
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投影器 投影台尺寸
Overhead projectors-projection stages dimensions
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摄影器材中的滤光镜尺寸
Optical filters for photographic equipment dimensions
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通用摄影光电曝光表
General purpose photoelectric exposure meters
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直径100mm以内的前镜筒与附件的配合尺寸
Front lens barrels up to 100mm-Dimensions important to the connection of auxiliaries
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照相镜头的色贡献指数
Colour contribution index of camera lenses
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