A senior mechanical engineer in a safety uniform wearing glasses is checking the operation of the machines in the factory.
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- 大图:4608 × 3072 像素·39.01 cm × 26.01 cm·300dpi·JPG
- 中图:1000 × 667 像素·35.28 cm × 23.53 cm·72dpi·JPG
- 小图:500 × 334 像素·17.64 cm × 11.78 cm·72dpi·JPG