{HEAD ~ The ratio} between {TAIL ~ the thickness} of the thin elements and thick patterns is typically of from 1/5 to 1/10 
between
{ HEAD ~ The ratio } between { TAIL ~ the thickness } of the thin elements and thick patterns is typically of from 1/5 to 1/10
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH