 |
| |||
| 光束発散度 (kōsoku-hassando) | |||
| luminous: 34 phrases in 7 subjects |
| Construction | 1 |
| General | 4 |
| Lighting other than cinema | 9 |
| Physics | 3 |
| Radio | 1 |
| Technology | 14 |
| Vacuum tubes | 2 |
|
| |||
| 光束発散度 (kōsoku-hassando) | |||
| luminous: 34 phrases in 7 subjects |
| Construction | 1 |
| General | 4 |
| Lighting other than cinema | 9 |
| Physics | 3 |
| Radio | 1 |
| Technology | 14 |
| Vacuum tubes | 2 |