| 1. | A block signal is a permissive signal, so non-blocking operation is allowed.
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| 2. | The same LOS obstacles that interfere with friendly force communications block signal-collection efforts.
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| 3. | This signal is known as a No . 0 block signal.
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| 4. | The entire line was governed by an absolute block signal system.
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| 5. | The last block signal before the home signal is number one.
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| 6. | In 1893 the high voltage, electric motor automatic block signal semaphore made its debut.
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| 7. | The test installation eliminated wayside block signals, and trains relied solely on cab signals.
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| 8. | Botox can reduce involuntary movements by helping to block signals between muscles and nerves.
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| 9. | Frequency selective surface-based metamaterials block signals in one waveband and pass those at another waveband.
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| 10. | Mo [ cicki stated during all legal case that the same block signal shown green aspect.
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