… Machine-tools (including way-type unit head machines) for drilling, boring, milling, threading or tapping by …
Explanatory notes
… ‑ Machine-tools (including way-type unit head machines) for drilling, boring, milling, threading or tapping by … unit head machines . These machines, which are designed to perform drilling, boring, milling, threading or tapping … equipped with guides (ways) and can therefore move back and forth repetitively when placed on a suitable base. The …