Ukuphumelela
Sesibe sebhizinisini lokupholisa injini iminyaka engaphezu kwengu-20, sigcina ezinye zezimoto ezinkulu, ezisebenza kanzima emhlabeni zisebenza ziqinile.Saqala ngokushaja ama-air cooler nama-oil cooler emalolini akuthelawayeka.Kodwa kule minyaka eyishumi edlule, sikhule saba abahlinzeki abakhulu bezingxenye zokupholisa zemishini ye-ag nengekho emgwaqweni onguthelawayeka, okuhlanganisa ezokwakha, izimayini, izimoto zamasosha kanye nemoto yokusebenza.
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