បច្ចេកវិទ្យាព្យាបាលផ្ទៃបំពង់ដែកអ៊ីណុក
I.Chemical code for metal surface treatment1.1.Pickling: The Art of Corrosion and RebirthProcess essence: using 15%-20% nitric acid and 3%-5% hydrofluoric acid solution, at 50-60 ℃ for 3-20 minutes of immersion, to remove 0.01-0.03mm surface of metal producer-0.03mm layer of German metal case-A.