| 1. | Like the pistons, the air valves are also controlled by various muscles.
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| 2. | The gyros were connected to air valves on an associated supply line.
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| 3. | Problem was, the air valve was at the bottom of the tire.
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| 4. | He described the four blue air valves, the canvas boots and other features.
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| 5. | Ballonet air valves were originally a butterfly type, actuated by springs.
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| 6. | But when air was released into the ballast tanks, the air valves froze closed.
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| 7. | When an air valve is closed, there is no airflow.
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| 8. | Weights strapped to the hemispheres could not pull them apart until the air valve was opened.
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| 9. | He said the air valve was a huge steel structure at the end of the pipeline.
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| 10. | The air valves are connected by a cam and linkage to the secondary fuel metering rods.
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