Uma kuziwa kumaphrojekthi wokwakha abandakanya ukugcina izindonga, ama-cofferdam, nama-bulkheads, ukunqwabelana kwamashidi ensimbi kuyisici esibalulekile. Njengesixazululo esingabizi nesisebenzayo sokugcina umhlaba kanye nokwesekwa kokumbiwa, kubalulekile ukuthola ikhasi leshidi lekhwalithi ephezulu...
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