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71. | air utilization ratio |
| 空气利用率 |
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72. | air metering unit |
| 空气流量计 |
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73. | air penetration |
| 空气渗透 |
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74. | liquefaction of air |
| 空气液化 |
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75. | air perssure probe |
| 空气压力传感器 |
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76. | air specific weight |
| 空气比重 |
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77. | air pressure reducer |
| 空气减压器 |
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78. | airborne contaminant |
| 空气污染物 |
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79. | air reduction process |
| 空气还原法 |
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80. | maneuvering air |
| 操纵空气 |
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