1.201 igwe anaghị agba nchara dabara adaba maka iji na gburugburu akọrọ ma dị mfe nchara n'ihe banyere mmiri.
2.304 igwe anaghị agba nchara, adabara n'èzí ma ọ bụ iru mmiri gburugburu, na ike corrosion na acid iguzogide.
3.316 igwe anaghị agba nchara, molybdenum gbakwunyere, ihe mgbochi corrosion na-eguzogide corrosion na-eguzogide corrosion, karịsịa maka mmiri mmiri ma ọ bụ kemịkalụ.
Oge nzipu: Ọktoba 27-2021