هترة ع., سلامة ا. and الضاهر ن. (2021) “Improving Mechanical Properties (Impact Strength and Wear Resistance) of Drilling Teeth Steel and Breakers Hammersr”, Tishreen University Journal -Engineering Sciences Series,, 43(2). Available at: http://www.journal.tishreen.edu.sy/index.php/engscnc/article/view/10552 (Accessed: 5May2024).