a fixed signal that lets engineers know if a train can enter a block.
A: ABS (automatic block system)
B: lock
C: lock signal
A: ABS (automatic block system)
B: lock
C: lock signal
举一反三
- manual block A: block controlled manually by a person known as a block operator. B: a fixed signal that lets engineers know if a train can enter a block.
- block signal A: a fixed signal that lets engineers know if a train can enter a block. B: a conductive connector used to maintain circuit continuity for track circuits and electrified tracks.
- The Switch block in the Signal Routing block library can be used to implement a piecewise function.
- _____, the train started. A: The signal given B: Giving the signal C: The signal being given D: The signal giving
- ________, the train started. A: The signal given B: After the signal was given C: Given the signal D: A and B