ĈҤI HӐ&Ĉ¬1 ҸNG 75Ѭ Ӡ1*Ĉ ҤI HӐ&6Ѭ3+ ҤM +2$+Ï$+ ӐC +2ẩ/8 N TT NGHIP &KX\rQQJjQK& QKkQKRiG c 7ơ, : 1*+,ầ1& ӬU CHIӂ77È&+;È&Ĉ ӎ 1+7+¬1+3+ ҪN +2È+ ӐC TӮ Dӎ CH CHIӂC N ±HEXANE CӪA Rӈ&Ỉ