O paipa u'amea lamolemole mo le ta'e o le suau'u, fa'apipi'i e pei o fa'asu'afu, fa'a'avevela fa'afefe ma
paipa i totonu o le suauu ma le faamamaina o laau. High quality carbon structural steel grades e 20g,
20mng ma 25mng; Alloy u'amea fa'atulagaina togi: 15mog, 20mog, 12crmog, 15CrMoG, 12Cr2MoG, 12CrMoVG, ma isi.