Differential thermal movement between the spacer frame and the glass panes is a key contributor to the aging of insulating glass edge seal and of the insulating glass unit-IGU-itself.是什么意思_Differential thermal movement between the spacer frame and the glass panes is a key contributor to the aging of insulating glass edge seal and of the insulating glass unit-IGU-itself.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句