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51. | water tight joint |
| 水密结合 |
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52. | non-tight bulkhead |
| 非密封舱壁 |
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53. | tight gas reservoir |
| 致密气层 |
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54. | tight financing policy |
| 紧缩性财政 |
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55. | tight registration tolerance |
| 紧密对准公差 |
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56. | water-tight vesse |
| 不透水容器 |
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57. | a tight wire |
| 拉得很紧的线 |
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58. | oil tight riveting |
| 油密铆钉 |
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59. | coupling power tight |
| 机械上紧接箍 |
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60. | tight money policy |
| 紧缩信用政策 |
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