… or permanent magnet chucks, clamps and similar holding devices; electro-magnetic couplings, clutches and brakes; …
Explanatory notes
… or permanent magnet chucks, clamps and similar holding devices; electro‑magnetic couplings, clutches and brakes; … covers electro‑magnets, those electro‑magnet operated appliances specially listed in the heading, permanent … and couplings . These may be of various types. Certain types consist of a fixed coil around a movable …