{HEAD ~ The gears} in {TAIL ~ the planetary gear trains} are sized to provide a desired speed reduction from the crank shaft to the cam shafts 
in
{ HEAD ~ The gears } in { TAIL ~ the planetary gear trains } are sized to provide a desired speed reduction from the crank shaft to the cam shafts
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH