water treatment
[DE] Wasseraufbereitung
[EN] water treatment
[FR] Traitement de l' eau
[VI] Xử lý nước
water treatment
[DE] Wasserreinhaltung
[EN] water treatment
[FR] Conservation de l' eau
[VI] Bảo tồn nước
water treatment,pollution control
[DE] Gewässerreinhaltung
[EN] water treatment, pollution control
[FR] Contrôle de la pollution de l' eau
[VI] Kiểm soát ô nhiễm nước