Iimeko zesicelo
-
Uhlalutyo lwesizathu sokungaphumeleli kwee-valve zensimbi ezingenasici
Unobangela wokungaphumeleli kokuqhekeka emva kweenyanga ezili-18 zesihluzi sentsimbi engenasiphene sisebenze iinyanga ezili-18, kwaye ivalve yokwaphuka yabhaqwa yaza yahlalutywa ivalve yokuphuka, izicubu zesigaba segolide, kunye nokwakheka kweekhemikhali.Iziphumo zibonisa ukuba indawo eqhekekileyo yevalve liqokobhe...Funda ngokugqithisileyo
