Magnesium alloy and aluminum alloy, the best way is through the cross section to distinguish! The cut is neat and delicate and the cut point floodlight intensity is aluminum magnesium titanium alloy, the cut is rough floodlight is aluminum alloy! In addition, listen to the sound, the general sound is clear and crisp aluminum magnesium titanium alloy, the sound is stuffy aluminum alloy, the two methods can be combined to use!