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| obstacle | |
| forestr. | hinder |
| transp. el. construct. | hinder |
| detection device | |
| el. | demodulator |
|
obstacle : 34 phrases in 18 subjects |
| Agriculture | 2 |
| Commerce | 1 |
| Communications | 3 |
| Economics | 1 |
| Education | 1 |
| Electric machinery | 1 |
| Electronics | 3 |
| Finances | 1 |
| General | 1 |
| Information technology | 2 |
| Labor law | 1 |
| Life sciences | 1 |
| Lighting other than cinema | 1 |
| Medical | 1 |
| Power lines | 1 |
| Radio | 1 |
| Social science | 1 |
| Transport | 11 |