Evgenieva E, Nikiforov I, Maltsev P, Dmitriev S. HIGH RIGIDITY AND VIBRATION ENDURANCE BAR FOR DEEP HOLES. ETR [Internet]. 2021 Jun. 16 [cited 2024 Dec. 22];3:62-5. Available from: https://journals23.rta.lv/index.php/ETR/article/view/6522