train order signal造句

例句与造句

1. A contributing factor was the failure of the express engineman to properly observe the train order signal at Shepherdsville.
2. As No . 4 approached the interlocking tower at Shops Junction, tower operator J . S . Johnson showed a clear signal from the tower's train order signals, indicating all was clear.
3. In the U . S ., semaphores were employed as train order signals, with the purpose of indicating to engineers whether they should stop to receive a telegraphed order, and also as simply one form of block signalling.
4. For example, it was common in the United States for train order signals to point the arm straight down to indicate " Proceed . " Many British Railway companies, for example the London North Eastern Railway, and the London, Midland and Scottish Railway, favoured the upper quadrant design since any fault in the mechanical linkage would default the signal to the " danger " or " stop " position.
5. It's difficult to find train order signal in a sentence. 用train order signal造句挺难的