al-zn-si-rn alloy
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al-zn-si-rn alloy is widely used thegalvalume steel producing. minimize the mass of coating,improve the influid of the alloy
al-zn-si-rn alloy is widely used thegalvalume steel producing. minimize the mass of coating,improve the influid of the alloy ,make the surface more smoothly, and overcome the traditional darkness tration.