|
double locking : 61 phrases in 19 subjects |
| Automated equipment | 4 |
| Automobiles | 2 |
| Bridge construction | 1 |
| Construction | 9 |
| Electronics | 1 |
| Energy industry | 1 |
| General | 2 |
| Leather | 4 |
| Machinery and mechanisms | 1 |
| Makarov | 1 |
| Military | 1 |
| Nuclear physics | 1 |
| Programming | 4 |
| Security systems | 1 |
| Technology | 15 |
| Telecommunications | 1 |
| Textile industry | 2 |
| Transport | 4 |
| Wrestling | 6 |