{HEAD ~ The cranks} confine {TAIL ~ the motion} of each of the transmission rings to a non rotary, planetary motion 
confine
{ HEAD ~ The cranks } confine { TAIL ~ the motion } of each of the transmission rings to a non rotary , planetary motion
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH