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| 31. | orientation angle |
| 定位角;定向角 |
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| 32. | posterior angle |
| 臀角|后角 |
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| 33. | alternate angle |
| 交错角;错角 |
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| 34. | angle of rifling |
| 螺纹角|切槽角|切螺纹角 |
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| 35. | angle of divergence |
| 扩散角展开角 |
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| 36. | impingement angle |
| 冲击角;碰撞角 |
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| 37. | convergence angle |
| 会聚角，收敛角 |
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| 38. | resolution angle |
| 鉴别角;分辨角 |
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| 39. | correction angle |
| 校正角;修正角 |
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| 40. | angular separation |
| 角间距|角距|角距离|方向夹角 |
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