NUMERICAL INVESTIGATIONS OF THE NATURAL FREQUENCIES AND MODE SHAPES OF THE TORSIONAL VIBRATIONS IN THE SAW UNIT OF A KIND OF WOOD SHAPERS, USED IN THE WOOD PRODUCTION. INNO [Internet]. 2026 Jan. 30 [cited 2026 Feb. 25];2(2). Available from: http://innojs.ltu.bg/index.php/scjournal-inno/article/view/101