Air change rate measurement for a newly renovated office with VRV system. Tracer gas (SF6) is used along with multipoint gas sampler and analyzer.是什么意思_Air change rate measurement for a newly renovated office with VRV system. Tracer gas (SF6) is used along with multipoint gas sampler and analyzer.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句