ÃܶÈÒ»°ã´óÓÚ850 kg/m3£¬²úÆ·¼Ó¹¤ÐÔÄܺ㬸÷ÏîÀí»¯ÐÔÄܽϸߣ¬¿ÉÒÔ´ïµ½ÖÐÃܶÈÏËά°å±ê×¼ÒªÇó£¬Ò»°ãÓÃÀ´ÖÆ×÷¸÷ÖÖ¸ô¶ÏǽÁú¹Ç¡¢¼Ò¾ßºÍ×°Ð޽ṹ¼þ£¬ÈçÐè³ÐÖصĻõ¼Ü¡¢´²°åµÈ