mautinoa lelei o Q235b galvanized paipa Q235b galvanized paipa o se ituaiga masani o paipa uamea, e masani ona faaaogaina i fanua e pei o le fausiaina, masini, alamanuia kemikolo, metallurgy, ma isi. O lona mea o le Q235B carbon structural sila, ma galvanizing togafitiga e mafai ona faaleleia lona anti- corrosio...
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