industrial rail ______
举一反三
- The cost of the air fare is higher than ______. A: the rail fare B: that of the rail fare C: those of the rail fare D: which of the rail fare
- High –speed rail is public transport by rail at speeds in excess of ________ km/h.
- ______is a device attached to a rail to prevent it from creeping in the direction of train travel. A: flat bottom rail B: ullhead rail C: ail ancho D: aseplate
- A _________________has a wider foot and narrower head. A: flat bottom rail B: ullhead rail
- Where is the measuring position of the uneven gauge in our country？ A: 10mm below the rail top surface B: 12mm below the rail top surface C: 14mm below the rail top surface D: 16mm below the rail top surface