| 1. | In all inertial frames for events connected by " light signals ".
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| 2. | Automatic and electric light signals was also a first for the railway.
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| 3. | Gunn was a communications specialist trained in flag and flashing light signals.
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| 4. | Qtera's equipment will speed light signals over fiber-optic lines farther than ever before.
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| 5. | The narrow-gauge railway now has colour light signals as entrance and exit signals.
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| 6. | The resulting light signal is kept constant by controlling the alterable cuff pressure.
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| 7. | According to CTK, the crossing did not have warning light signals.
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| 8. | Finally, Coleraine was resignalled with three-aspect colour light signals in 1938.
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| 9. | Signaling uses the German BOStrab system, not traditional Norwegian light signals.
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| 10. | The semaphores were replaced with colour light signals and electrical interlocking.
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