reflectance: 30 phrases in 12 subjects |
Antennas and waveguides | 1 |
Chemistry | 2 |
Communications | 1 |
Earth sciences | 5 |
Electronics | 1 |
Industry | 5 |
Lighting other than cinema | 4 |
Measuring instruments | 1 |
Natural sciences | 1 |
Technology | 5 |
Transport | 3 |
Wood processing | 1 |