N99 en · NOUN
Etymology
From Initialism of Not resistant to oil particles with 99% filtration efficiency in NIOSH air filtration ratings.
Meanings
- (uncountable) N99; Ellipsis of NIOSH N99. ▸ N99 standard
- (countable) N99; Ellipsis of NIOSH N99. ▸ N99 filter
Forms
| Spelling | Features | Labels | Source |
|---|---|---|---|
| N99s | Number=Plur | lexicographic |
Coordinates
R99 · P100 · N100 (99.97% filtration) · P99 (99% filtration) · R100