Metalworking industry. Internal grinding of a hole with a spark by means of cooling at the foreign enterprise.
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- 大图:3983 × 2651 像素·33.72 cm × 22.45 cm·300dpi·JPG
- 中图:1000 × 666 像素·35.28 cm × 23.5 cm·72dpi·JPG
- 小图:500 × 333 像素·17.64 cm × 11.75 cm·72dpi·JPG