您要查找的是不是：
- B级钢 B grade steel
- C级钢 low alloy cast steel grade C
- E级钢 Grade E steel
- B级船板钢 class B shipbuilding hull steel
- X65级钢 X65 grade steel
- ⅢB级配料 Ⅲ B materials
- 钢厂 steelworks
- 碳钢 carbon steel
- 级联 connection
- 钢的 steel
- 校级 field rank
- 钢带 metal strip
- 英语四级 English Band 4
- 钢化 steel
- “B级”考试 passing rate
- 铸钢 cast(carbon) steel
- 大学英语四级 College English Band 4
- 钢制 steeliness
- 一级的 firstlevel
- 螺纹钢 deformed steel bar
