A. Al-Khashab M, J. Al-Khaldey T. The Design of the Iron Shroud Geometrical Shape in the Condenser-Objective Electromagnetic Lens. RSCI [Internet]. 2018 Mar. 1 [cited 2025 Oct. 2];27(1):277-89. Available from: https://rsprs.uomosul.edu.iq/index.php/rsci/article/view/46487