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real-time electrical controllers for machine tools and robots; computerized numerial controllers for machine tools, including single and multiple slide lathes, turning centers, milling machines, machining centers, boring machines, gantry machines, machines for internal and external grinding, gear cutting, and laser cutting machines; programmable electrical controllers, couplers, and control cards for machine tools, including single and multiple slide lathes, turning centers, milling machines, machining centers, boring machines, gantry machines, machines for internal and external grinding, gear cutting, and laser cutting machines; and variable speed electrical controllers for pins, pivots, and spindles