 |
| earth circuit: 53 phrases in 16 subjects |
| Automated equipment | 3 |
| British usage, not spelling | 1 |
| Communications | 6 |
| Construction | 1 |
| Electrical engineering | 19 |
| Electronics | 1 |
| Isolation | 1 |
| Makarov | 4 |
| Mass media | 2 |
| Medical | 1 |
| Medical appliances | 1 |
| Occupational health & safety | 8 |
| Oil and gas | 2 |
| Power system protection | 1 |
| Sakhalin | 1 |
| Technology | 1 |