Raws li kev lag luam thoob ntiaj teb kev vam meej, cov kav hlau steel sawv ua qhov nruab nrab tseem ceeb rau kev thauj mus los, ua lub luag haujlwm tseem ceeb hauv ntau yam haujlwm.Txawm li cas los xij, vim muaj kev sib txawv ntawm kev siv ib puag ncig, cov kav dej hlau yog qhov ua rau corrosion thaum thauj thiab siv, ua rau kev tiv thaiv corrosion ...
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