ƽ¾ùÖØÁ¿:753¹«½ï/m3 ±ÈÖØ:0.68 ÓÃ;:½¨Öþ²ÄÁÏ¡¢¼Ò¾ß¡¢µØ°å¡¢Ä¾ÃÅ¡¢ÊÒÄÚ½¨ÖþÉè¼Æ¼°Ï¸Ä¾ÖÆÆ·¡¢×°ÊÎÏßÌõ¡¢³ø¹ñ¡¢Ïâ°å¡µÈ