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Kurwanya ikirere Bwinshi Film Powder ikwirakwira
Sima. Sima ya Portland, Magnesium Chloride na Binder itemewe kuriIcyuma gitunganya umuriro urwanya ibikoresho byibanze. Ibihuza bidasanzwe bikoreshwa harimo harimo muri alkali conted na fosisfate, nibindi
