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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Polyurea polyrethanes having improved physical properties
Polyurethane elastomers, process for their production and...
Preheating device for internal combustion engine intake air and
Process for the CFC-free production of cellular polyurethane mol
Process for the production of cellular polyurethane elastomers
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