“Implementation of Non-Destructive Radiographic Testing for Welding Defect Inspection on Heat Exchanger Project DXXXX at PT XYZ”. Jurnal Serambi Engineering 11, no. 1 (January 6, 2026). Accessed January 27, 2026. https://jse.serambimekkah.id/index.php/jse/article/view/1493.