Mea masani valve ma le faanumeraina o tomai fa'apolofesa Fa'ata'ita'iga mea fa'aoga Valve
Mea masani valve mea ma faanumera tomai fa'apolofesa tulaga Valve mea fa'ameamea Fa'alava masani ma numera o tomai fa'apolofesa, e aofia ai WCB, LC3, WC6, WC9, ma isi, WCB: Carbon sila ASTM A216 fa'aoga e le fa'aleagaina, e aofia ai vai, suau'u easygoin...
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