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| 41. | increasing pitch |
| 递增螺距 |
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| 42. | pitch discrimination |
| 音高辨别 |
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| 43. | Scan pitch |
| 扫查间距 |
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| 44. | propeller pitch |
| 桨距 |
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| 45. | variation pitch |
| 调螺距 |
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| 46. | electrode pitch |
| 电极用沥青 |
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| 47. | diametral pitch |
| 径节 |
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| 48. | controllable pitch |
| 活螺距|可调螺距 |
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| 49. | equipotential pitch |
| 等位距 |
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| 50. | ordinary pitch ( |
| 其值为 |
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