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