Chitsulo chachitsulo ndi chitsulo chachitali chokhala ndi gawo lofanana ndi groove, cha carbon structural steel pomanga ndi makina, ndipo ndi gawo lachitsulo lomwe lili ndi zigawo zovuta, ndipo mawonekedwe ake apakati ndi opangidwa ndi groove. chitsulo chanjira chimagawidwa kukhala ordinar ...