| 41. | Dual controls are standard, but cockpit doors are optional.
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| 42. | There were a pair of tandem open cockpits over the wing fitted with dual controls.
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| 43. | Dual controls and an enclosed cabin were factory options.
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| 44. | The cab was equipped with mechanically interlocked dual controls to enable operation in either direction.
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| 45. | The one-engine plane has dual controls and it was not clear which pilot was flying.
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| 46. | The Tandem incorporated dual controls to facilitate flight instruction.
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| 47. | The proposed mechanism of action refers to the Kinsey dual control model of sexual response.
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| 48. | There were tandem cockpits fitted with dual control.
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| 49. | Everybody's got that; today the luxury car has " automatic climate control " with dual controls.
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| 50. | 1878-French-British dual control in Egypt is suspended.
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