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FIRE RETARDANT COMPOSITIONS ESSENTIALLY CONTAINING 3-(DIALKYLPHOSPHONO)-PROPIONAMIDE DERIVATIVE AND WATER SOLUBLE MELAMINE RESIN; WOODY MATERIAL COATED OR IMPREGNATED WITH SUCH COMPOSITIONS
FIRE RETARDANT COMPOSITIONS ESSENTIALLY CONTAINING 3-(DIALKYLPHOSPHONO)-PROPIONAMIDE DERIVATIVE AND WATER SOLUBLE MELAMINE RESIN; WOODY MATERIAL COATED OR IMPREGNATED WITH SUCH COMPOSITIONS