| |||
optical system | |||
concentrating system |
sistema óptico : 36 phrases in 12 subjects |
Communications | 9 |
Cultural studies | 2 |
Earth sciences | 3 |
Electronics | 1 |
Health care | 1 |
Industry | 1 |
Information technology | 10 |
Natural sciences | 1 |
Technology | 3 |
Transport | 3 |
United Nations | 1 |
Video recording | 1 |