Still more particularly, it is directed to {HEAD ~ molded hardboard roofing shingles} impregnated with {TAIL ~ a phosphorus} containing phenolic resin 
Still more particularly , it is directed to { HEAD ~ molded hardboard roofing shingles } impregnated with { TAIL ~ a phosphorus } containing phenolic resin
OTH OTH 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