| |||
| 汚濁源 River and Water Resources Glossary (Infrastructure Development Institute Japan) | |||
|
pollutant source : 3 phrases in 1 subject |
| General | 3 |
| |||
| 汚濁源 River and Water Resources Glossary (Infrastructure Development Institute Japan) | |||
|
pollutant source : 3 phrases in 1 subject |
| General | 3 |