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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Blowing agents and their use in preparations of polyester foams
Blowing agents and their use in preparations of polyester foams
Blowing agents and their use in preparations of polyester foams
Method of producing polyester foams using borohydride dispersion
Method of producing polyester foams using borohydride dispersion
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