era:functionalInfrastructure/contactLineSystems/01_SE%C3%84s_N2_SEHu_OCL | era:concepts/energy-supply-systems/AC_15kV-16.7Hz | : defaulthttps://triplydb.com/era/NorwegianRailwayDirectorate/graphs/ Create a prefix for https://triplydb.com/era/NorwegianRailwayDirectorate/graphs/ Hit Enter to save Double click to create a prefix |