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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Bead-form expandable styrene polymers having a high expansion ca
Bead-form, expandable styrene polymers having a reduced internal
Bead-like expandable molding materials having high heat distorti
Biodegradable polyester material particles
Continuous production process of expandable styrene polymer bead
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