Cov khoom siv ua haujlwm ywj pheej sib dhos ua ke siv cov khoom siv aluminium ntawv qhia rail lossis steel ncej qauv.Lub cev muaj zog reducer tsav cov saw hlau txav mus.Ob sab ntawm cov cuab yeej phaj tau muab tso rau ntawm cov saw hlau kom tsav lub logistics.Cov neeg ua haujlwm sib sau ua ke thiab ua haujlwm ntawm lub phaj tooling.Txhua qhov chaw nres tsheb...