您要查找的是不是：
- B级绝缘 B-class insulation
- C级绝缘 class C insulation
- H级绝缘浸渍漆 class-H insulating impregnating varishs
- F级绝缘胶的研究 The Study of the Insulating Binders of Class F
- B级钢 B grade steel
- Ｆ级绝缘材料 class F insulating material
- ⅢB级配料 Ⅲ B materials
- B级船板钢 class B shipbuilding hull steel
- 级联 connection
- 校级 field rank
- 英语四级 English Band 4
- 自动重置N.C.系列,连接过热保护装置,两个潮气检测探头,预润滑轴承和F级绝缘。 "automatic reset N.C. series connected thermal overload protection, two moisture sensing probes, prelubricated shaft bearings and class F insulation."
- 大学英语四级 College English Band 4
- 一级的 firstlevel
- 船级 ship' classification
- 三级片 third-grade film
- 无级 stepless
- 级配 graduation
- “B级”考试 passing rate
- 两级 two-stage
