12L13 12L14 12L15 ndi chitsulo chodula chaulere.Chitsulo chodulira chaulere ndi mtundu wachitsulo womwe ndi wosavuta kudula (monga kutembenuza, mphero, kukoka, kupanga, kubowola, etc.), yomwe imadziwikanso kuti automatic machine tool processing steel, yofupikitsidwa ngati chitsulo chodziwikiratu.ndi zosavuta kudula zitsulo zitsulo, zosavuta kudula zitsulo n'zosavuta kukhala (kutembenuka, mphero, kujambula, planing, kubowola, etc.) kudula processing zitsulo, amatchedwanso basi makina chida processing zitsulo, amatchedwa basi zitsulo.Zimapangidwa kuti zigwirizane ndi makina opangira makina komanso kupanga mzere wothamanga.