This is done through a mechanical process frequently via a pole inserted through the lid of the churn
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- 大图:5184 × 3888 像素·43.89 cm × 32.92 cm·300dpi·JPG
- 中图:1000 × 750 像素·35.28 cm × 26.46 cm·72dpi·JPG
- 小图:500 × 375 像素·17.64 cm × 13.23 cm·72dpi·JPG