… Machine-tools for working any material by removal of … or photon beam, ultrasonic, electro-discharge, electro-chemical, electron beam, ionic-beam or plasma arc processes; …
Explanatory notes
… or photon beam, ultrasonic, electro‑discharge, electro‑chemical, electron beam, ionic‑beam or plasma arc processes; … process machine-tools which cut semiconductor chips or which cut or drill ceramic substrates for …