wherein said {HEAD ~ outer teeth gears} include {TAIL ~ a plurality} of outer teeth, each of said outer teeth being crowned 
include
wherein said { HEAD ~ outer teeth gears } include { TAIL ~ a plurality } of outer teeth , each of said outer teeth being crowned
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH