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Grally nchara nchara 304 bụ ihe a na-ejikarị igwe anaghị agba nchara. Grally nchara 304n nwere ike iguzogide ọkwa karịa ogo 302, ma ọ naghị abụkarị magnetic na okike; Agbanyeghị mgbe oyi na-arụ ọrụ na ọ na-enweta ogo magnetik.
ASTM A403 WP310 \ / 310s bụ oke ọkụ na-eguzogide obi na-eguzogide ịdị elu na-enwe oke iguzogide oxida site na ọnọdụ ogologo oge site na 2000of.