{HEAD ~ Yet another advantage} of the invention is that {TAIL ~ the end} of the waveguide is stiffened, strengthened and made easier to handle 
{ HEAD ~ Yet another advantage } of the invention is that { TAIL ~ the end } of the waveguide is stiffened , strengthened and made easier to handle
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH