例句與造句

1. "' Datatrak "'was a hyperbolic radio navigation system similar to Decca, which operated on frequencies between 130 kHz and 150 kHz in the LF-range.
2. Datatrak was in use from the 1980ies until the first half of the first decade in the 21st century in use in Germany, UK, Austria, Belgium, Luxembourg and the Netherlands.
3. The Datatrak receiver determines its exact position from the LF signals and transmits its position back to the central in Swindon, UK by UHF radio links, whereby also the transmission of telemetry data was possible.
4. Datatrak was operated in the UK by Securicor Information Systems and by Siemens-Datatrack on continental Europe and was originally used for the surveillance of vehicles of Securior, but later also allowed for the use of other customers.
5. It's difficult to find datatrak in a sentence. 用datatrak造句挺難的