整个工厂需安装有足够的紧急照明系统(带有备用电池)。

Adequate emergency lighting (with a battery back-up) should be installed throughout the factory.

youdao

整个工厂需安装有足够的紧急照明系统(带有备用电池)。

Adequate emergency lighting (with a battery back-up) should be installed throughout the factory.

youdao