Metal that has a constant abrasive sample etchech on No.4 goods. It is mostly employed for building construction resources for both of those inside and exterior and 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 – Tiêu