求翻译：厂房部分一层的调试室、清洗间等以及二层部分房间，含有有毒有害气体，因此设计事故排风系统。风机选用变频风机，设计风量为事故通风时的12次换气，当事故发生时,风机运行加大换气量以满足事故排风的需要。是什么意思？

The plant part of a layer of the debug room, clean room and second floor of some rooms contain toxic and harmful gases, design accident exhaust system. The fans use variable frequency fan, the design air volume ventilation for emergency ventilation of 12 times when the accident occurred, the fan ope

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正在翻译，请等待...

Plant part of a debug room, cleaning rooms and parts of the second floor rooms contain toxic harmful gas, therefore designing exhaust system. Wind machines use variable frequency fan, 12 times for air when designing ventilation air volume is accident, when an accident occurs, wind turbine run increa