Metal using a steady abrasive pattern etchech on No.4 products. It is mostly used for constructing development elements for both of those inside and exterior and also for sash, doors, and panels in buildingsTh2 ?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 trong th?c ph?m – Tiêu ch