Indicator element for road lanes, is set into road surface and has light source mounted on elastic element
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Electronically secured power supply for a circuit group and display for variable information
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display device
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Monitoring of LED type displays to ensure they are operating correctly, e.g. for signal displays used with railway switching and control, by monitoring the current drawn by individual display units and the whole unit
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Display device with luminescent elements
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Light signalling devices with light emitting diodes
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Light signal consisting of LEDs connected to voltage via current source
