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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active
Compounds containing hydroxyl groups and urethano-aryl-sulfonic
Compounds containing hydroxyl groups and urethano-aryl-sulfonic
Expandable non-sagging polyurethane compositions
Process for the preparation of polyisocyanates which contain biu
Thermoplastic ternary molding composition of polyurethane polyph
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