Assertion: key weir | /r/HasAspect | rectangular plan shape
Facets:
value: unlike a labyrinth weir
type: OTHER
Source sentences:
text: Similar to a labyrinth weir structure, the Piano Key Weir consists of single or multiple cycles, but unlike a labyrinth weir, it has a rectangular plan shape, and sloped apex bays (not vertical walls) that give the Piano Key Weir its greater efficiency.