12ÔÂ8ÈÕ£¬ÉÂÎ÷ÑÓ°²ÒË´¨ÍíÊ츻ʿ³ö¿â¼Û¸ñÎȶ¨£¬80#Æð²½°ëÉÌÆ·4.1-4.2Ôª/½ï£¬75#Æð²½ÉÌÆ·¹ûÖ÷Á÷³ö¿â¼Û¸ñ3.5Ôª/½ï×óÓÒ£¬75#Çá΢±ù±¢¹û2.2-2.4Ôª/½ï£¬Àä¿â¸ß´Î1.7-1.8Ôª/½ï¡£¹ûÅ©¿¹¼ÛÇéÐ÷ÈԽϸߣ¬ÕûÌå³É½»Á¿²»´ó£¬ÒԵͼۻõÔ´³ö¿âΪÖ÷¡£