… beam, ionic-beam or plasma arc processes; water-jet cutting machines. …
Explanatory notes
… beam, ionic‑beam or plasma arc processes; water-jet cutting machines . - Operated by laser or … of masks and reticles. (iii) Machines for dry-etching patterns on semiconductor materials. Examples of the … other hard materials and machines for engraving (figures, letters, lines, etc.) on various highly resistant materials. …