Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
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Integral skin rigid polyurethane structural foam
Integral skin rigid polyurethane structural foam
Integral skin rigid urethane foam
Low density, water-blown, rigid polyurethane foams having good p
Low density, water-blown, rigid polyurethane foams having good p
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