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51. | propulsive thrust |
| 推进推力 |
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52. | electrothermal propulsion |
| 电热推进 |
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53. | electric ship propulsion |
| 电船推进 |
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54. | atomic propulsion |
| 原子推进 |
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55. | plasma propulsion |
| 等离子体推进 |
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56. | push with all might |
| 全力推进 |
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57. | perigee propulsion |
| 近地点推进 |
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58. | spacecraft propulsio |
| 航天器推进 |
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59. | propelling movement |
| 推进运动 |
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60. | propulsion trial |
| 推进试验 |
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