Umehluko phakathi kwamabhethri e-alkaline namabhethri e-carbon 1, ibhethri ye-alkaline izikhathi ezingu-4-7 zamandla ebhethri ye-carbon, intengo yi-1.5-2 izikhathi ze-carbon.2, ibhethri ye-carbon ifanele izinto zikagesi zamanje eziphansi, njengewashi le-quartz, isilawuli kude, njll.;Amabhethri e-alkaline afanelekile...
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