น้อยผล อ. . . . and มณีรัตน์ น. . (2020) “Metal Classifying Machine Using Ultrasonic Testing Method”, Engineering and Technology Horizons , 34(2), pp. 16–22. Available at: https://ph01.tci-thaijo.org/index.php/lej/article/view/241416 (Accessed: 19 May 2024).