They have a center,and arms of matter that seem to circle the center like a pinwheel.

VOA: special.2009.04.29

His throat was powerless. His arms and hands were like lead.

VOA: special.2009.10.31

"On station one,we have robot arms. And what happens is the robots have different joints like a human arm -- one at the shoulder,one at the elbow, wrist and then a claw.

VOA: special.2010.07.28