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51. | electromechanical machining |
| 机电加工 |
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52. | electromechanical relay |
| 机电继电器 |
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53. | electromechanical servos |
| 机电伺服系统 |
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54. | electromechanical oscillograph |
| 机电示波器 |
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55. | Electrical and Mechanical Services Department |
| 机电工程署 |
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56. | electromechanical efficiency |
| 机电效率 |
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57. | electromechanical check |
| 机电检查 |
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58. | electromechanical oscillations |
| 机电振荡 |
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59. | electromechanical circuit |
| 机电回路 |
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60. | electromechanical pantograph |
| 机电缩放仪 |
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