Mo le ASTM standard, mea eseese e eseese vasega uʻamea, e le gata i lea, o latou mea faʻainisinia ma vailaʻau vailaʻau, mea tau metallurgical e eseese uma. O lo'o i ai lisi mo tulaga astm fa'atasi ai ma vasega u'amea eseese. ASTM A53 / A53M Fa'amatalaga Fa'apitoa mo Pipa, Uamea, La...
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