Chitoliro chokhala ndi mipanda iwiri: ndi mtundu watsopano wa chitoliro chokhala ndi khoma lakunja la annular ndi khoma losalala lamkati.Amagwiritsidwa ntchito kwambiri popereka madzi ambiri, madzi, ngalande, kutulutsa zimbudzi, utsi, mpweya wabwino wapansi panthaka, mpweya wabwino wa migodi, ulimi wothirira m'minda ndi zina zambiri zogwira ntchito pansi pa 0.6MPa.Mtundu wamkati wamkati wamivuto yamakhoma awiri nthawi zambiri umakhala wabuluu ndi wakuda, ndipo mitundu ina imagwiritsa ntchito chikasu.