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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# Extract entities and relations for knowledge graph building，详情可参考体育直播
美, 이란전쟁에 하루 1조3000억원 쓴다…전투기 뜨면 443억