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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Pre-foamed particles of polypropylene resin and process for prod
Process for producing foamed and molded article of polypropylene
Process for producing foamed body of polycarbonate resin and foa
Process for producing foamed polyolefin articles from aged pre-f
Process for producing pre-foamed particles of polyolefin resin
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