manually operated signal造句

例句与造句

1. There is a level crossing near the station as well as a manually operated signal box, which in 2016 was listed as being due for computerisation.
2. Since 1980, the number of manually operated signal boxes on the British rail network has declined by 44 percent, to about 1, 000, and the number of signal workers has shrunken by 37 percent.
3. It's difficult to find manually operated signal in a sentence. 用manually operated signal造句挺难的