Pvc-o, Suav lub npe biaxial oriented polyvinyl chloride, yog ib daim ntawv tshiab ntawm evolution ntawm PVC yeeb nkab, los ntawm kev tshwj xeeb orientation ua technology los tsim cov yeeb nkab, PVC-U yeeb nkab uas tsim los ntawm extrusion txoj kev yog stretched axially thiab circumferentially, thiaj li hais tias tus PVC ntev saw molecul...
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