KHETHO EA BITM A1993 E akaretsa litlhoko tse tšosang tse matla tsa mocheso o phahameng kapa litšebeletso tse ngata tsa khatello le lits'ebeletso tse ling tse khethehileng tsa khatello. Ke tlhaloso e tloaelehileng e hlalosang sebopeho se tloaelehileng ea lik'hemik'hale, litlhokahalo tse thata, litlhokahalo tse amanang le mocheso, lilila, litifinse, liphula-puo le litlolo tse ling. Asst A193 e hlalosa mofuta oa Si (metric) le likarolo tsa ponto.