Parameter：
Serie | KN |
Corresponding standard | N90 |
| Enterprise label (grade) | KD-Ⅲ |
| Flow | 85L |
| Inspection requirements | Monolayer |
| Resistance (pa) | ≤70 |
| PFE efficiency (%) | ≥85 |
| Gram weight (g) | 25 |
| Color | White |
| Detection medium | 氯化钠（Nacal） |
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