circuit occupancy造句

例句与造句

1. The junction signal is provided with a route indicator, and exhibits the least-restrictive straight route indication permitted by track circuit occupancy.
2. A fall-back signalling system, relying on conventional track-circuit occupancy detection, is included to ensure fully automatic operation and train protection independent of the radio system.
3. It's difficult to find circuit occupancy in a sentence. 用circuit occupancy造句挺难的