Factory- ncaj qha siab- ceev steel qws cov khoom siv nrog lub peev xwm ntau lawm ntawm 300-600 m / min; txias- dov khoom rau deformed steel rods. Cov pas hlau ua los ntawm peb cov khaub thuas- dov ribbed bar tshuab ua kom pom tseeb, ua tiav, thiab cov qauv sib txawv.
