DIFF Subgroup
E02B 5/087 Full Title
Artificial water canals, (for water-power plants E02B9/02; irrigation of soil E02B13/00) > Details, e.g. gates, screens
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E02B 5/087 Artificial water canals, (for water-power plants E02B9/02; irrigation of soil E02B13/00) > Details, e.g. gates, screens