______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: flat bottom rail
B: ullhead rail
C: ail ancho
D: aseplate
举一反三
- A _________________has a wider foot and narrower head. A: flat bottom rail B: ullhead rail
- ____is a train and rail system that reaches a high sustained rate of travel. Usually the speed is greater than 200 km/h.
- Don’t let your rails creep over time. Rail anchors protect against the forces of train traffic and weather.What do rail anchors protect against? A: Broken baseplates . B: Joint wear. C: Welding accidents. D: Creeping rails.
- High-speed rail is a passenger train system.
- 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