CUs of hands placing telephone parts into mold cavity of die casting machine. CU of assembled parts sliding down chute toward camera. CUs of drilling of die housing on vertical drill, of drill sinking into metal. MS of elderly worker operating hi-speed precision lathe. CUs of hands polishing shaft on precision lathe, using micrometer. Shots of milling machine cutter in action, of cylindrical grinding machine. Shot of two bosses discussing problem, worker approaching and presenting something to boss' inspection then walking away. MS of woman in white smock operating machine. CUs of woman placing carborundum points and shaft into machine. Shots of toolmaker checking work through microscope with aid of shadowgraph. Several shots of die casting machines in operation, machine electrode creating mold, sparking colourfully, automatic casting machines. Shot of welder spot welding plate, grinding weld. Shots of men assembling machine, soldering electronic panel. CUs of hands weighing tiny parts on laboratory scales, measuring parts with micrometer.