As previously noted, {TAIL ~ the counter rotational gearing} may be accomplished with {HEAD ~ a continuously variable transmission} 
As previously noted , { TAIL ~ the counter rotational gearing } may be accomplished with { HEAD ~ a continuously variable transmission }
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD