Based on the analysis of the function of building smoke extraction system, the article differentiates smoke extraction system from vent system in the function and operation means.是什么意思_Based on the analysis of the function of building smoke extraction system, the article differentiates smoke extraction system from vent system in the function and operation means.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句