{HEAD ~ The guard panel portion} 204 is of {TAIL ~ generally circular profile} and slightly convex shape 
is of
{ HEAD ~ The guard panel portion } 204 is of { TAIL ~ generally circular profile } and slightly convex shape
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH