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31. | ramp transition reflection |
| 斜坡过渡反射 |
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32. | ramp velocity medium |
| 渐变速度介质 |
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33. | separated exit ramp |
| 独立出口滑道 |
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34. | hatch cover ramp |
| 舱盖跳板 |
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35. | cattle loading ramp |
| 牲畜装卸斜坡台 |
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36. | Ramp Metering System |
| 匝道仪控系统 |
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37. | Metered Freeway Ramp |
| 匝道仪控 |
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38. | ramp-transition function |
| 斜坡过渡函数 |
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39. | Ramp Metering Signal |
| 匝道仪控号志 |
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40. | Exit Ramp Closure |
| 出 口匝道关闭 |
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