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51. | alternating-current computer |
| 交流计算机 |
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52. | alternating current electrical engineering |
| 交流电工学 |
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53. | alternating current resistance box |
| 交流电阻箱 |
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54. | alternating-electric field |
| 交流电场 |
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55. | alternating current tractio |
| 交流牵引 |
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56. | alternating-current amplifier |
| 交流放大器 |
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57. | alternating current tube |
| 交流电子管 |
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58. | alternating-current dump |
| 交流清除 |
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59. | alternating electromagnet |
| 交流电磁铁 |
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60. | scientific communication |
| 科学交流 |
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