Ukuncibilika kwengilazi akuhlukaniseki emlilweni, futhi ukuncibilika kwayo kudinga izinga lokushisa eliphezulu.Amalahle, igesi yomkhiqizi, negesi yedolobha ayisetshenziswa ezinsukwini zakuqala.Esindayo, i-petroleum coke, igesi yemvelo, njll., kanye nokushiswa komoya-mpilo ohlanzekile wesimanje, konke kushiswa kuhhavini ukuze kukhiqizwe amalangabi.Ulaka oluphezulu...
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