Labyrinth, Broad-crested, Sharp-crested, Piano keys, and Compound are types of?
Drowning machine Low head dam Weir (hydraulic) Diversion weir Weirs Weir Lowhead dam Weir (dam) Low-water dam
drowning machine diversion weir low water dam low head dam weir lowhead dam weir dam weir hydraulic weirs
weir
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Weir