The plurality of {HEAD ~ the drive and driven gears} provides for a smooth power flow and {TAIL ~ decrease} of energy loss 
The plurality of { HEAD ~ the drive and driven gears } provides for a smooth power flow and { TAIL ~ decrease } of energy loss
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH