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.
在各地解封之後，中國經歷了一波感染新冠疫情的高峰，劉亮憶述，當時有不少認識的長輩離世，回到老家湖南之後，他參加了很多場喪事，「心裡面特別不舒服......太難受，不斷喝白事的酒。」
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Subresource Integrity — MDN Web Docs
Twig's Ben Hartwig says the company is now eyeing expansion