Fa'aigoa o le butterfly valve ma auala e fa'aoga ai, fa'apea fo'i ma le fa'atauga o puipuiga, tausiga, fa'amatalaga auiliili.
O ituaiga valve o le butterfly ma auala e faʻaoga ai, faʻapea foʻi ma le faʻatauina o puipuiga, tausiga, faʻamatalaga auiliili O le valve valve o se valve pipeline masani, o ona uiga autu o le fausaga faigofie, faigofie ona faʻaogaina, faʻamaufaʻailoga lelei. E tusa ai ma le...
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