A waterproof cover covers the axial gap and serves to suppress {TAIL ~ water} from the outside from reaching {HEAD ~ the bearing} 
A waterproof cover covers the axial gap and serves to suppress { TAIL ~ water } from the outside from reaching { HEAD ~ the bearing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD