URI
Notation
626
Caption
Hydraulic engineering in general
Application Note
For engineering details, machinery, equipment use auxiliary numbers 62-1/-9
Broader class
626/627  Hydraulic engineering and construction. Water (aquatic) structures
Narrower classes
626.1Inland navigable waterways. Canals. Canalized rivers
626.4Locks
626.5Lifting gear and inclined planes for vessels
626.8Agricultural hydraulics. Irrigation, drainage and reclamation engineering
626.9Maritime canals. Ship canals