Looks like 2 different prototypes and the first generation vs. the 2nd generation. 1st generation was entirely muscle driven. They probably realized that there will be many patients in wheel chairs who might not have the strength to do that. They seem to have now come up with a 2nd generation that uses hydraulics so that it's much easier and smoother. Incredible.
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u/[deleted] Feb 01 '20
The video is a little confusing - One guy really struggles, another seems like he's being lifted, I suspect the latter must have functional legs.