3907: Polyacetals, polyethers, polycarbonates, etc, primary

390710: Polyacetals, in primary forms 390720: Polyethers nes, in primary forms 390730: Epoxide resins, in primary forms 390740: Polycarbonates, in primary forms 390750: Alkyd resins, in primary forms 390760: Polyethylene terephthalate, in primary forms 390791: Polyesters nes, unsaturated, in primary forms 390799: Polyesters nes, in primary forms 3907: Polyacetals, polyethers, polycarbonates, etc, primary