Wide blackboard inscribed with scientific formulas and calculations in physics mathematics and electrical circuits. Science and education background.
ID: 2115712202
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- 大图:8950 × 5000 像素·75.78 cm × 42.33 cm·300dpi·JPG
- 中图:1000 × 559 像素·35.28 cm × 19.72 cm·72dpi·JPG
- 小图:500 × 280 像素·17.64 cm × 9.88 cm·72dpi·JPG