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қосымша қаптау

Secondary glazing is a less effective form of double glazing, used where the latter is unaffordable or undesirable in some way (such as in listed buildings). A separate layer of glass or plastic is fitted to the inside of the existing window frame. The gap between the two panes determines its effectiveness in insulating against heat loss and noise.

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Құс жолының көпіршіктері

The two giant bubbles of high-energy gamma rays protruding from the Milky Way, each spanning 25,000 light-years across, roughly the size of the galaxy ...