Watch: Moment crew docks at International Space Station
Donna Lu is an assistant editor, climate, environment and science at Guardian Australia
。关于这个话题，91视频提供了深入分析
Publication date: 10 March 2026
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.