eyes

Explanatory chart for exercises to protect the eyes
Explanatory chart for exercises to protect the eyes (1973, June)
Pay attention to the signals ahead, absolutely guarantee the safety of moving trains
Pay attention to the signals ahead, absolutely guarantee the safety of moving trains (early 1980s)
Illustration of eye exercises
Illustration of eye exercises (early 1980s)
General knowledge about three types of attack educational wall charts
General knowledge about three types of attack educational wall charts (1983, June)
General knowledge about three types of attack educational wall charts
General knowledge about three types of attack educational wall charts (1983, June)
Children should pay attention to protecting their eyesight when watching TV
Children should pay attention to protecting their eyesight when watching TV (1985, March)
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