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

معرفی کتاب «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» نوشتهٔ National Fire Protection Association، منتشرشده توسط نشر National Fire Protection Association در سال 2017. این کتاب در فرمت pdf، زبان انگلیسی ارائه شده است.