¸Ã³µµÄÅäÖü«Îª¼òµ¥£¬ÉÏÉîÏÂdzɫµÄÄÚÊηç¸ñ£¬ÆÕͨÈÞ²¼×ùÒÎËÄ·½Ïò¿Éµ÷½Ú£¬Ã»Óа²È«ÆøÄÒ£¬PVC²ÄÖÊ·½ÏòÅ̲»¿Éµ÷½Ú£¬ºóÅÅ×ùÒοÉÒÔÕûÅŷŵ½£¬¸ÖÂÖì±£¬Ö÷»úÖ»Äܲ¥·ÅÊÕÒô»úºÍ¿¨´ø£¬2¸öÑïÉùÆ÷¡£