D508 steel yeeb nkab yog cov khoom siv yeeb nkab steel nrog kev ua tau zoo thiab kev siv dav. Nws muaj qhov zoo ntawm lub zog siab, hnav tsis kam, tiv thaiv corrosion, thiab lwm yam, thiab muaj cov ntawv thov tseem ceeb hauv kev tsim kho engineering, kev tsim khoom siv, kev thauj mus los, thiab lwm yam ...
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