O vaega e sefulu o le vali fa'afoliga e aofia ai: uiga vali S, E, R, F tau.Fa'asinomaga o femalagaiga MI tau, tulaga fa'alanu fa'ailoga LDF tau, faigofie fufulu mea taua WF tau, si'i mana fa'asino igoa BDI taua / tau inorganic, tau organic (I / O) ma solubility, e sefulu ta'iala autu mo le perf autu...
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