“PROSES PENGUJIAN ULTRASONIC TESTING (UT) DALAM MENDETEKSI CACAT LAMINASI: ”., JATRA, vol. 8, no. 1, pp. 73–79, Jun. 2026, Accessed: Oct. 24, 2026. Available: https://clone-jurnal.polibatam.ac.id/index.php/JATRA/article/view/12990