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2013 new upgraded 17'' top grade led vision acuity chart test

China, China
US $1,300.00
Jan 30th

Top Grade LED Vision Chart (17'' screen) LED screen Advantages: Energy saving --- it reduces 30% power consumption compared with LCD screens. Long life span. High brightness and contrast --- With LED screen you can see all the test pictures clear even under strong light.

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2013 new upgraded 17'' top grade led vision acuity chart test