Steel that has a continuous abrasive pattern etchech on No.four items. It is usually employed for setting up development products for each interior and exterior as well as for sash, doorways, 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 trong th?c ph?m –