Umbhobho wentsimbi ye-Spiral usetyenziswa ikakhulu kubunjineli bamanzi, kwishishini lepetrochemical, ishishini lemichiza, ishishini lamandla ombane, ukunkcenkceshela kwezolimo, ukwakhiwa kwedolophu.Ukuthutha ulwelo: unikezelo lwamanzi kunye nokukhupha amanzi.Ukuthutha igesi: igesi, umphunga, igesi yepetroleum engamanzi.Ngolwakhiwo...
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