Assertion: filter | /r/HasProperty | rectangular
Facets:
value: always
type: DEGREE
Source sentences:
text: These filters are always rectangular (giving the ability to move them in all directions) and are typically used with filter holders.
text: The name top-hat originates from the shape of the filter, which is a rectangle function, when viewed in the domain in which the filter is constructed.
text: Larger filters may be rectangular and the distribution arms may be driven by hydraulic or electrical systems.