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| 二級河川 (にきゅう・かせん) | |||
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| 二級河川 (にきゅう・かせん) River and Water Resources Glossary (Infrastructure Development Institute Japan) | |||
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class B river : 1 phrases, 1 sujets |
| Général | 1 |
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| 二級河川 (にきゅう・かせん) | |||
| |||
| 二級河川 (にきゅう・かせん) River and Water Resources Glossary (Infrastructure Development Institute Japan) | |||
|
class B river : 1 phrases, 1 sujets |
| Général | 1 |