Ilyasov AM, Zhamanbalin МB. Features of the production and calibration of reference hardness test blocks: Features of the production and calibration of reference hardness test blocks. Phys. Sci. Technol. [Internet]. 2022 Oct. 27 [cited 2024 Dec. 4];9(3-4):32-8. Available from: https://phst.kaznu.kz/index.php/journal/article/view/289