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This is above-elbow functional prosthesis,
controled hook and elbow by harnesses
insert stamp into the socket,and wear harness across my chest
I can control 3 actions without another hand,
1) bending elbow, 2) locking
3) hook control.
pull harness by back and left arm, shoulder actions.
By getting used to it,body action is getting smaller.
front view
This is "elbow lock" action,
I can lock any angle I want.
pull harness with elbow locking, I can open hook.
working together 3 actions,
bend elbow and lock,then hook open,
unlock elbow and hold out.