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Gịnị mere jacks ji ebuli ibu dị arọ na obere mgbalị?
Ihe ngosi nke "nnukwu nloghachi maka obere ntinye ego" dị n'ebe nile na ndụ kwa ụbọchị. Igwe mmiri hydraulic bụ ihe atụ nke "nnukwu nloghachi maka obere ego".Ihe mejupụtara jakị ahụ bụ nke aka, ntọala, mkpanaka piston, cylin ...GỤKWUO