7 Machine tools, for forming, shaping or machining metal or plastic or other rigid materials by cutting, boring, grinding, sharpening or finishing; milling, drilling, copying and turning machines, tool turrets and tool disc turrets; replacement and structural parts for the aforesaid machines and turrets, in particular electric, hydraulic and electromechanical drives, positioning devices, gears, couplings, fluid valves, hydraulic and pneumatic and lubricant-dispensing units; rotary indexing tables; tool stores, namely, tool magazines; machine tool holders; machine tool and workpiece positioning holders; workpiece holders being parts of machines, interchangeable chucks for machines excluding land vehicles; power tools being parts of machines, namely, motor-driven spindles with and without swivelling units; industrial robots for machine handling and positioning; industrial robots for separating, cutting, joining, welding, milling, deburring, grinding, peeling, rolling and polishing; machines for gripping, moving and positioning mechanical components, including workpieces and/or tools; tool changers being parts of machines for mechanical rotation, turning, lifting; machine parts in the nature of conversion and mechanically driven devices for retaining, tensioning and gripping workpieces; operating devices being parts of machines for the aforesaid machines