Metal that has a steady abrasive sample etchech on No.four products and solutions. It is usually employed for constructing construction elements for both of those inside and exterior as well as for sash, doors, and panels in structuresTh2 ?ng vi sinh dùng trong th?c ph?m – Tiêu chu?n và ?ng d?ng Ch?c n?ng bình lu?n b? t?t ? ?ng vi sinh dùng