Tsav ncej: Feem ntau siv nyob rau hauv tsheb, yuav tsum tau tiv taus siab torque, feem ntau yog alloy structural steel.
Planet ncej : Siv nyob rau hauv reducers thiab kis tau tus mob, yuav tsum tau txhua yam khoom thiab qaug zog tiv thaiv, feem ntau carbon structural steel thiab alloy structural steel.
