{HEAD ~ A sign board} is formed on {TAIL ~ translucent/transparent substrate} by attaching fluorescent foils so formed to opposite sides of the substrate 
is formed on
{ HEAD ~ A sign board } is formed on { TAIL ~ translucent / transparent substrate } by attaching fluorescent foils so formed to opposite sides of the substrate
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH