Cov yeeb nkab steel yog ib qho khoom lag luam steel muaj nyob rau hauv ntau cov qib kawm, tshwj xeeb, thiab cov kev xav tau kev kawm. Cov yeeb nkab steel tuaj yeem siv rau cov kua dej thiab cov hmoov txhuv nplej, sib pauv cua txias, thiab ntim khoom siv. Siv cov yeeb nkab steel tsim cov hnab tawv me, txhawb nqa, thiab kev txhawb nqa kom txo qis 20}} 40% ntawm cov hlau thiab ua kom mechanived Hoobkas, kev tsim kho mechanized. Siv cov yeeb nkab steel hauv kev tsim kev loj