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And, if a robot arm were to swing out towards you, for safety reasons you would want to be able to immediately stop it and push it back without harming yourself, reverse that motion instantly. For one thing, that requires a back-driveable actuator.
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A map of the province of Morrowind for the Tamriel Rebuilt project. Note that the original game includes only the large island in the bay in the top half of the image.
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