ASTM A234 faʻapipiʻi paipa uʻamea faʻapipiʻi ua faʻaaogaina lautele i faiga paipa, e aofia ai le uʻamea uʻamea ma mea uʻamea uʻamea.O le a le mea fa'apipi'i paipa uamea?Uamea paipa fetaui e faia i le carbon uamea po o le u'amea uamea paipa, ipu, talaaga otooto, i se foliga patino e mafai ona faia se galuega (Ch...
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