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| 81. | feathering pitch |
| 顺桨桨距 |
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| 82. | controllable pitch |
| 活螺距|可调螺距 |
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| 83. | propeller pitch |
| 桨距 |
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| 84. | pitch circumference |
| 节圆周长 |
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| 85. | ordinary pitch ( |
| 其值为 |
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| 86. | commutator pitch |
| 换向期距 |
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| 87. | adjustable pitch |
| 可调螺距|活螺距 |
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| 88. | pitch autopilot |
| 俯仰自动驾驶仪 |
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| 89. | international pitch |
| 国际音高 |
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| 90. | pitch measurement |
| 垂直间隙测定 |
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