| |||
| clave | |||
|
keystone : 19 phrases in 10 subjects |
| Antennas and waveguides | 1 |
| Baseball | 1 |
| Communications | 5 |
| Construction | 1 |
| Environment | 1 |
| Forestry | 2 |
| Politics | 1 |
| Superconductivity | 1 |
| Technology | 4 |
| Television | 2 |
| |||
| clave | |||
|
keystone : 19 phrases in 10 subjects |
| Antennas and waveguides | 1 |
| Baseball | 1 |
| Communications | 5 |
| Construction | 1 |
| Environment | 1 |
| Forestry | 2 |
| Politics | 1 |
| Superconductivity | 1 |
| Technology | 4 |
| Television | 2 |