应用		?÷òaó|ó??úPVC??′°Dí2??￠1ü2?1ü?t?￠μ???μ?à?μè?üá??¨2????·?D
特点		???°?ò???÷òaéú2úèy???μáDμ?2ú?·￡o?eê????￠?eê??í?°PVC?′o??è?¨?á2ú?·?￡?eê????°?íàà2ú?·?÷òa?a?ò??μ??′o??è?¨?á2ú?·??ì×￡??éò?3?·?±￡???ò???′o??è?¨?á?-2?á?μ??êá??°3é±??o?ùá|￡?í?ê±￡?2?·?2ú?·1?ó|??PVC?è?¨?á?￠PVC???·?°?????à1?2ú?·éú2ú3§éì?￡
特性		??óDó?òìμ?èè?è?¨D?￡?±￡??2ú?·μ??·3??ó1¤D??ü ??óD3?é?μ?1a?è?¨D?￡?±￡??2ú?·μ?3¤?ú?íoòD? ?àì?μ?×èè?D??ü￡?óDD§?a???t??éú2ú?°??ê?1y3ì?D×?è??êìa ??óD?üo?μ?·?ì?á÷?ˉD? ó?PVCóD?üo?μ??àèYD?

???°?ò???÷òaéú2úèy???μáDμ?2ú?·￡o?eê????￠?eê??í?°PVC?′o??è?¨?á2ú?·?￡?eê????°?íàà2ú?·?÷òa?a?ò??μ??′o??è?¨?á2ú?·??ì×￡??éò?3?·?±￡???ò???′o??è?¨?á?-2?á?μ??êá??°3é±??o?ùá|￡?í?ê±￡?2?·?2ú?·1?ó|??PVC?è?¨?á?￠PVC???·?°?????à1?2ú?·éú2ú3§éì?￡
 
?′o??è?¨?á?êéú2ú?üá|′?4íò??￡??ò2ú?üè??ú2???à??1?D?￡????éú2ú1y3ìíêè?×??ˉ?ˉ????￡??ú′?2úá?′ó·ù???ó￡?±￡??á?2ú?·?êá?μ??è?¨D??￡2ú?·D?×′?a??×′?￠·?×′?°á￡×′￡??÷òaó|ó??úPVC??′°Dí2??￠1ü2?1ü?t?￠μ???μ?à?μè?üá??¨2????·?D?￡