J422 |
E4303 |
JIS D4303 |
焊接较重要的低碳钢结构和同强度等级的底合金钢,如09Mn2等。
For welding the important structures on mild carbon steel and the same grade low alloy-steels, as 09Mn2 etc. |
|
|
J422 |
E4303 |
JIS D4303 |
焊接较重要的低碳钢结构和同强度等级的底合金钢,如09Mn2等。
For welding the important structures on mild carbon steel and the same grade low alloy-steels, as 09Mn2 etc. |