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