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41. | space propultion |
| 空间推进 |
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42. | propulsive performance |
| 推进性能 |
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43. | spacecraft propulsio |
| 航天器推进 |
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44. | auxiliary propulsion |
| 辅助推进 |
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45. | atomic propulsion |
| 原子推进 |
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46. | propulsion trial |
| 推进试验 |
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47. | TJP (Turbojet Propulsion) |
| 涡轮喷气推进 |
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48. | propulsive thrust |
| 推进推力 |
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49. | advance of ice cover |
| 冰层推进 |
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50. | propulsive horsepower |
| 推进马力 |
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