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респиратор : 53 phrases in 17 subjects |
| Chemistry | 7 |
| Construction | 6 |
| Firefighting and fire-control systems | 1 |
| General | 3 |
| Medical | 10 |
| Medical appliances | 5 |
| Metallurgy | 1 |
| Military | 1 |
| Mining | 1 |
| Navy | 1 |
| Nuclear physics | 1 |
| Occupational health & safety | 3 |
| Security systems | 1 |
| Technology | 9 |
| Textile industry | 1 |
| Welding | 1 |
| World war II | 1 |