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