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Grates (Pmhpdm)

Definition
Barriers that have parallel or crossed bars blocking a passage but admitting air. (Source: wordnet.princeton.edu)
Broader Term
Drainage structures (Pmhpd)
Related Terms (Hierarchical)
Catch basins (Pmhpdb)
Detention basins (Pmhpdc)
Ditches (Pmhpdd)
Drainage canals (Pmhpde)
Drains (Pmhpdf)
Drainage basins (Pmhpdh)
Drainage blankets (Pmhpdj)
Gutters (Pmhpdp)
Manholes (Pmhpdq)
Sewers (Pmhpds)
Sumps (Pmhpdu)
Swales (Pmhpdv)