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。

The NFPA has specific requirements for remote annunciators used in some applications, such as hospitals.

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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。

The NFPA has specific requirements for remote annunciators used in some applications, such as hospitals.

youdao