frequency control: 50 phrases in 18 subjects |
Agriculture | 1 |
Automated equipment | 3 |
Communications | 4 |
Electricity generation | 1 |
Electronics | 20 |
Finances | 2 |
General | 7 |
Health care | 1 |
High energy physics | 1 |
Industry | 1 |
Measuring instruments | 2 |
Mechanic engineering | 1 |
Medical appliances | 1 |
Patents | 1 |
Radio | 1 |
Telecommunications | 1 |
Textile industry | 1 |
Transport | 1 |