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optical: 161 phrases in 15 subjects |
Chemistry | 7 |
Communications | 8 |
Earth sciences | 9 |
Electronics | 39 |
General | 6 |
Health care | 2 |
Industry | 3 |
Information technology | 20 |
Medical | 2 |
Microsoft | 2 |
Natural sciences | 2 |
Patents | 53 |
Physical sciences | 6 |
Technology | 1 |
Transport | 1 |