Ko te 304 kowiri whitiki e whakamahia nuitia ana i roto i te mara o te kowiri tira.Ina koa i roto i te taatai, te taputapu me te hikohiko, nga taputapu, me etahi atu, ka wehea te tira ki te kowiri tira austenitic, te kowiri tira ferritic, te kowiri tira martensitic, te kowiri tira austenitic-ferritic duplex ...
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