大口径a系列是美国消防协会可互换的缸线，是设计和建造擅长最苛刻的应用。
The Large Bore a Series is an NFPA Interchangeable cylinder line that is designed and built to excel in the most demanding applications.
在马达控制中心（MCC ）为2150马力发动机是第一个移动必须建立和美国消防协会批准为20和UL 215 。
The motor control center (MCC) for the 21 50 HP motors was the first MCC to be built and approved per NFPA 20 and UL 215.
如果安装在防火喷淋系统上，所有机械式止回阀，如警告止回阀和防回流阀，都应该根据美国国家消防协会NFPA13和NFPA25标准进行流量测试和内部检查。
If installed on a fire sprinkler system, all mechanical checks, such as alarm checks and backflow preventers, should be flow tested and inspected internally in accordance with NFPA 13 and NFPA 25.
如果安装在防火喷淋系统上，所有机械式止回阀，如警告止回阀和防回流阀，都应该根据美国国家消防协会NFPA13和NFPA25标准进行流量测试和内部检查。
If installed on a fire sprinkler system, all mechanical checks, such as alarm checks and backflow preventers, should be flow tested and inspected internally in accordance with NFPA 13 and NFPA 25.
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