JIS溶接技能者評価試験【SA-3F】完全解説します

Transcript

Hello, this is a blog.This time I will explain how to pass SA3F.The difficult part of SA3F is that the final layer is relatively concave, so if you are trying it for the first time , you may not know the right number of layers or number of passes, so I will explain how to pass SA3F. Let's talk about the black skin. Be sure to remove the black skin ... Read More