… by laser or other light or photon beam, ultrasonic, electro-discharge, electro-chemical, electron beam, ionic-beam or …
Explanatory notes
… laser or other light or photon beam, ultrasonic, electro‑discharge, electro‑chemical, electron beam, ionic‑beam or … devices, electronic integrated circuits or flat panel displays. (ii) Machines for working any material by … which are caused by a focused intense laser beam directed at the workpiece. In certain machine-tools of this …