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Chozungulira cha Casing
Chozungulira chozungulira ndi mtundu watsopano wa kubowola komwe kumaphatikiza mphamvu zonse za hydraulic ndi transmission, komanso kuwongolera makina, mphamvu ndi madzi. Ndi ukadaulo watsopano, wosamalira chilengedwe komanso wothandiza kwambiri pakubowola. M'zaka zaposachedwa, wagwiritsidwa ntchito kwambiri m'mapulojekiti monga kumanga sitima yapansi panthaka ya m'mizinda, mulu wolumikizana wa dzenje lozama, kuchotsa milu ya zinyalala (zotchinga pansi pa nthaka), njanji yothamanga kwambiri, msewu ndi mlatho, ndi milu yomanga m'mizinda, komanso kulimbitsa damu la malo osungiramo madzi.