“√∫—≠ Abstract (ÒÒ) ‡°√‘Ëππ” Û ¬âÕπ√Õ¬Õ¥’µ™π™—Èπ°≈“߉∑¬ ¯ ‡»√…∞°‘®‡ √’: ®“°Õ”π“®π‘¬¡ Ÿà°√–· Õ”π“®‡∫Á¥‡ √Á® ÒÛ ∫Ÿ√≥“°“√ ‘∑∏‘¡πÿ…¬™π‡æ◊ËÕ°“√æ—≤π“∑’ˬ—Ë߬◊π Ú¯ ç‡À≈’¬«À≈—ß ·≈Àπâ“é ÙÙ (9)