Twj tso kua mis (Twj tso kua mis conveying conveying) Kev Taw Qhia thiab Kev Xam Xaj ntawm Cov Yeeb Nkab Thermal Expansion Steel cov hom ntim khoom Kev Cuam Tshuam ntawm Cov Hlau Hauv Cov Yeeb Nkab Alloy Rau Kev Ua Tau Zoo
