Study hard improve every day
Tags
- China
- poster
- Chinese
- propaganda
- tractor
- electricity pylon
- transmission tower
- train
- tractor girl
- pencil
- rocket
- ship
- airplane
- girl
- boy
- satellite
- mountains
- Pioneers
- caliper
- grain
- 1979
- industrial plant
- satellite dish
- globe
- microscope
- slide rule
- book bag
- door gods
- menshen
- 门神
- generator
- weather station
- pumping station
- pump
- test tube
- atom symbol
- triangle
- T-square
