서명 | NFPA 499 Recommended Practice for the Classification of Combustible Dusts and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas (1997 Edition) |
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저자 | National Fire Protection Association |
발행처 | National Fire Protection Association |
발행년도 | 1997 |
청구기호 | 530.029 N277n |
소장처/자료실/서가 | 안전보건공단/일반자료실/ |