The common ventilation methods of working face are type , Z type, Y type, H type and so on.
举一反三
- The professional work type generally works within the whole working face length.
- The professional work type generally works within the whole working face length. A: 正确 B: 错误
- Which of the following is not a common optical cable structure? A: Layer twist type B: Center beam tube type C: Honeycomb type D: Ribbon type
- Based on the type of works, drama can be divided into historical drama, modern drama, melodrama, fable play, fairy tale and so on.
- A common type of cooked meal in Britain could be ______.