The transition process from {TAIL ~ the standby fluid flow} to {HEAD ~ the assisting fluid flow} is easily changed so that it does not make the driver feel uncomfortable and therefore supplies the assisting force effectively 
The transition process from { TAIL ~ the standby fluid flow } to { HEAD ~ the assisting fluid flow } is easily changed so that it does not make the driver feel uncomfortable and therefore supplies the assisting force effectively
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH