| |||
| air trap; clean out trap; drain trap; gulley trap; running trap; siphon trap; stretch trap | |||
| liquid trap | |||
| siphon; syphon | |||
|
sifao : 76 phrases in 14 subjects |
| Agriculture | 5 |
| Chemistry | 10 |
| Communications | 1 |
| Construction | 9 |
| Earth sciences | 1 |
| Electronics | 2 |
| Environment | 2 |
| Industry | 2 |
| Mechanic engineering | 26 |
| Medical | 1 |
| Metallurgy | 12 |
| Municipal planning | 1 |
| Telegraphy | 1 |
| Transport | 3 |