A model demonstrates the Welwalk WW-1000, a wearable robotic leg brace designed to help partially paralyzed people walk at the main system with treadmill and monitor, at Toyota Motor Corp.'s head office in Tokyo, Wednesday, April 12, 2017. Toyota Motor Corp.'s Welwalk WW-1000 system is made up of a motorized mechanical frame that fits on a person’s leg from the knee down. (AP Photo/Eugene Hoshiko)
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