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