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| 分級度 River and Water Resources Glossary (Infrastructure Development Institute Japan) ; ふるい分け係数 River and Water Resources Glossary (Infrastructure Development Institute Japan) | |||
| 篩分係数 (ふるいわけけいすう) | |||
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sorting coefficient : 1 do fraz, 1 tematyki |
| Pospolicie | 1 |