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interlocking : 136 phrases in 19 subjects |
| Astronomy | 2 |
| Chemistry | 1 |
| Communications | 24 |
| Construction | 6 |
| Earth sciences | 3 |
| Electric traction | 1 |
| Electronics | 4 |
| Industry | 11 |
| Information technology | 6 |
| Labor law | 1 |
| Materials science | 9 |
| Mechanic engineering | 5 |
| Metallurgy | 3 |
| Natural sciences | 2 |
| Packaging | 1 |
| Rail transport | 10 |
| Social science | 1 |
| Technology | 1 |
| Transport | 45 |