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