They are UL Listed for three-hour fire rating and satisfy all ADA requirements.

拥有三小时防火等级的UL认证，并达到ADA所有的要求标准。

youdao

They are UL Listed for three-hour fire rating and satisfy all ADA requirements.

拥有三小时防火等级的UL认证，并达到ADA所有的要求标准。

youdao