The NFPA 17A Standard for Dry Chemical Extinguishing Systems 2021 edition Paperback is a textbook published by the National Fire Protection Association in the United States. This standard provides guidelines and requirements for the installation, maintenance, and inspection of dry chemical extinguishing systems. It is a valuable resource for education and reference purposes, offering information on the subject area in English language. This trade paperback format book is a must-have for those interested in fire protection systems and regulations.