| |||
| 井筒工法 (いづつこうほう) Concrete Terminology Glossary (Gururaj Rao) | |||
| |||
| オープンウェル法 River and Water Resources Glossary (Infrastructure Development Institute Japan) | |||
| |||
| 井筒工法 (いづつこうほう) Concrete Terminology Glossary (Gururaj Rao) | |||
| |||
| オープンウェル法 River and Water Resources Glossary (Infrastructure Development Institute Japan) | |||
