Hot adagulung'undisa mpweya zitsulo zozungulira mipiringidzo, monga 15 #, 20 #, 35 #, 45 #, 50 #, 55 #, ndi 60 #, chimagwiritsidwa ntchito m'mafakitale osiyanasiyana chifukwa katundu wawo kwambiri makina ndi kusinthasintha. Ziwerengerozi zimayimira kuchuluka kwa kaboni kapena zinthu zina zachitsulo, ndipo nthawi zambiri zimagwirizanitsidwa ndi zitsulo zaku China.
Mipiringidzo yozungulira yozungulira ya kaboni yotenthayi imadziwika chifukwa cha mphamvu zawo zazikulu, makina abwino, komanso kuwotcherera, kuwapangitsa kukhala oyenera kugwiritsa ntchito monga ma shafts, ma axles, magiya, ndi zida zina zamakina. Nthawi zambiri amagwiritsidwa ntchito popanga zida zamagalimoto, zida zaulimi, ndi zida zaukadaulo wamba.