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triple glazing

noun [U]
 
 

Definition

three layers of glass in a door or window that are separated by air spaces to prevent heat escaping from a room or to reduce the amount of noise coming in from outside: The insulation from triple glazing is significantly greater than that from double glazing.Windows and parts of windows
(Definition of triple glazing noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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