 |
 |
 |
 |
 |
|
|---|---|---|---|---|---|
| 1 | soil improvement | 地盤改良 | |||
| 2 | soil improvement | 土壌改良 | |||
| 3 | soil improvement works | 土壌改良事業 | |||
| 4 | subsoil improvement by deep tillage | 深耕土層改良 | |||
|
|
|
|
|
|
|---|---|---|---|---|---|
| 1 | soil improvement | 地盤改良 | |||
| 2 | soil improvement | 土壌改良 | |||
| 3 | soil improvement works | 土壌改良事業 | |||
| 4 | subsoil improvement by deep tillage | 深耕土層改良 | |||