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White Light Screen Measuring Focal Length Optical Bench Accessories Optical Experimental Equipment Convex Lens Imaging Experiment [Complete experiments]: you can complete various experiments, mirror imaging, pinhole imaging, etc., experiment various optical routine experiments. [High Safety Performance]:The Optical Experiment Equipment Set Is Made Of Smooth And Burr-Free... White Light Screen Measuring Focal Length Optical Bench Accessories Optical Experimental Equipment Convex Lens Imaging Experiment

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