| 41. | Conversely, Vettel retired early on due to power unit issues.
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| 42. | Underhill said the Olathe center's power units have been modified.
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| 43. | Both power units drove through a friction drive and belt to the rear axle.
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| 44. | The auxiliary power unit was run for six hours, but no neurotoxins were detected.
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| 45. | Westinghouse's power units had 1996 revenue of $ 3.08 billion.
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| 46. | The warning light indicated the plane's auxiliary power unit was on fire, officials said.
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| 47. | Shuttles have long used a chemical called hydrazine to run their auxiliary power units.
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| 48. | Jackson said an auxiliary power unit that froze up on ascent is now working.
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| 49. | The union's theory is this : Hydraulic fluid leaks into the auxiliary power unit.
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| 50. | The heart of the system is the power unit, which produces the suction for vacuuming.
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