"Va'au butterfly vai: Ta'iala galue, fausaga ma su'esu'ega fa'aoga"
"Valve butterfly Hydraulic: Faʻatonuga galue, fausaga ma suʻesuʻega faʻaoga" O le valve butterfly hydraulic o se faʻaoga masani o le faʻaogaina o le vai, faʻaaogaina lautele i le suauʻu, vailaʻau, eletise eletise, vai i le taulaga ma isi fanua. O lenei pepa o le a suʻesuʻeina ...
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