Sound Insulation Performance: IGU is ideal sound insulating material.Normal IGU can reduce noise by 30 decibel, IGU filled with inert gas can further reduce 5 decibel.是什么意思_Sound Insulation Performance: IGU is ideal sound insulating material.Normal IGU can reduce noise by 30 decibel, IGU filled with inert gas can further reduce 5 decibel.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句