| |||
| 下層路盤 (かそうろばん) River and Water Resources Glossary (Infrastructure Development Institute Japan) | |||
| 部分基 (ぶぶんき) | |||
| 補助基層 (ほじょきそう) | |||
|
subbase : 10 phrases in 2 subjects |
| General | 1 |
| Technology | 9 |
| |||
| 下層路盤 (かそうろばん) River and Water Resources Glossary (Infrastructure Development Institute Japan) | |||
| 部分基 (ぶぶんき) | |||
| 補助基層 (ほじょきそう) | |||
|
subbase : 10 phrases in 2 subjects |
| General | 1 |
| Technology | 9 |