| 서명 | NFPA 497 Recommended Practice for the Classification of Flammable Liquids, Gases, or Vapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas 2021 Edition) |
|---|---|
| 저자 | National Fire Protection Association |
| 발행처 | NFPA |
| 발행년도 | 2020 |
| 청구기호 | 530.029 N277n |
| 소장처/자료실/서가 | 안전보건공단/일반자료실/ |