73.
플라스틱 연질필름끼리 나열한 것은?
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①
PET(polyethylene terephthalate), ETFE(ethylene tetrafluoroethylene)
②
PE(polyethylene), EVA(ethylene vinyl acetate)
③
PVC(polyvinyl chloride), PC(polycarbonate)
④
PE(polyethylene), ETFE(ethylene tetrafluoroethylene)