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51. | cooling conveyor rack |
| 齿条式冷床 |
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52. | rack one's Brain |
| 绞尽脑汁,努力思索 |
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53. | rack banking stop |
| 齿条止挡 |
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54. | Biomedical Double Rack |
| 生物医学双架 |
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55. | life-jacket rack |
| 救生衣架 |
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56. | general instrument rack |
| 通用机柜 |
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57. | in-rack sprinkler |
| 装在货架内的喷水灭火装置 |
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58. | steam rack dryer |
| 蒸汽排管干燥室 |
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59. | goods turning rack |
| 货物转向架 |
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60. | pinion and-rack |
| 齿轮齿条式 |
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