国内阀门材料常用技术标准 低合金钢焊条、检验规则
焊 条 型 号 | 每批最高量,t |
EXX03-X EXX13-X | 50 |
EXX00-X EXX10-X EXX11-X EXX15-X EXX16-X EXX18-X EXX20-X EXX27-X |
30 |
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