I le fa'ata'ita'iga, o lo'o fa'amaonia mea eseese mo le gaosiga o pa'u. O nei mea e aofia ai uʻamea manganese, uʻamea faʻatasi ma martensitic structure (o loʻo taʻua i lalo o martensitic steels), chrome steels ma Metal Matrix Composites (MMC, egceramic), lea o uʻamea eseese ...
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