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| 51. | pitch measurement |
| 垂直间隙测定 |
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| 52. | adjustable pitch |
| 可调螺距|活螺距 |
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| 53. | international pitch |
| 国际音高 |
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| 54. | pitch thermometer |
| 沥青温度计 |
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| 55. | commutator pitch |
| 换向期距 |
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| 56. | pitch circumference |
| 节圆周长 |
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| 57. | feathering pitch |
| 顺桨桨距 |
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| 58. | pitch shortening |
| 绕组节距缩短 |
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| 59. | pitch autopilot |
| 俯仰自动驾驶仪 |
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| 60. | pitch tolerance |
| 螺距公差 |
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