O a uiga o mea sili ona lelei mo le faʻaogaina o valve butterfly?
O a uiga o mea sili ona lelei mo le faʻaogaina o valve butterfly? O le valve butterfly manual o se ituaiga valve e masani ona faʻaaogaina, faʻatasi ai ma le fausaga faigofie, laʻititi laʻititi, mamafa mama, ola umi o le tautua, tausiga faigofie ma isi mea lelei. Ae ui i lea, faʻafefea ona faʻatau se e...
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