The conical sections are either stepped or smooth for {HEAD ~ different force loadings} particularly in {TAIL ~ the application} of different types of closures thereto 
particularly in
The conical sections are either stepped or smooth for { HEAD ~ different force loadings } particularly in { TAIL ~ the application } of different types of closures thereto
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH