The NFPA has specific requirements for remote annunciators used in some applications, such as hospitals.
美国国家防火协会对指示器在某些行业的应用有特殊要求，例如医院等。
Annunciators are typically used in applications where the equipment monitored is not located in a portion of the facility that is normally attended.
指示器通常使用在监测设备不在设备现场的应用。
Annunciators are typically used in applications where the equipment monitored is not located in a portion of the facility that is normally attended.
指示器通常使用在监测设备不在设备现场的应用。
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