| |||
| 半減指向角 River and Water Resources Glossary (Infrastructure Development Institute Japan) | |||
|
half value half angle : 1 phrase in 1 subject |
| Lighting other than cinema | 1 |
| |||
| 半減指向角 River and Water Resources Glossary (Infrastructure Development Institute Japan) | |||
|
half value half angle : 1 phrase in 1 subject |
| Lighting other than cinema | 1 |