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空气卫生
| 标准
| 空气卫生 | |
| nurs. | sanitation of air |
| 标准 | |
| tech. | standard |
| AC’97 标准 | |
| IT | Audio Codec’97 |
| IFOAM标准 | |
| food.ind. law | IFOAM norm |
| ISO标准 | |
| environ. | ISO standard |
| T. 30标准 | |
| IT | T.30 standard |
| T1标准 | |
| IT | T1 standard |
| T3标准 | |
| IT | T3 standard |
| |||
| sanitation of air | |||
| air hygiene; air sanitation | |||
| 空气卫生: 6 phrases in 5 subjects |
| Agriculture | 1 |
| Ecology | 1 |
| Hydroelectric power stations | 1 |
| Nursing | 2 |
| Technology | 1 |