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| 技术维护试验 | |||
| 维护试验 | |||
| 维护测试; 维护检查 | |||
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maintenance test : 72 phrases in 14 subjects |
| Air defense | 1 |
| Architecture | 1 |
| Automobiles | 1 |
| Aviation | 31 |
| Business | 8 |
| Economy | 1 |
| Electronics | 13 |
| Hydroelectric power stations | 2 |
| Navigation | 1 |
| Rail transport | 1 |
| Shipbuilding | 1 |
| Space | 4 |
| Technology | 6 |
| Telecommunications | 1 |
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