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51. | laboratory environment |
| 实验室环境 |
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52. | engineering laboratory |
| 工程技术实验室 |
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53. | aeronautical laboratory |
| 航空实验室 |
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54. | laboratory manual |
| 实验室手册 |
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55. | lab investigation |
| 实验室测试 |
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56. | laboratory data |
| 实验室资料 |
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57. | laboratory beater |
| 实验室打浆机 |
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58. | laboratory maintenance |
| 实验室保管 |
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59. | laboratory computer |
| 实验室计算机 |
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60. | laboratory oscillator |
| 实验室振荡器 |
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