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elevators and skyscrapers
Steel made it possible to build Skyscrapers. Answer "construction of skyscrapers"
the elevator!
Basically steel, concrete and glass
The duration of Walls of Glass is 1.43 hours.
Steel.
Walls of Glass was created on 1985-10-30.
Between Glass Walls was created in 2010.
There are various applications for glass walls. Glass walls can open up small cramped spaces in a house or building. Glass walls can also allow more light into a room or building.
One technology that made skyscrapers possible would be the elevator. The other, I suspect is structural steel.
skyscrapers
As mirrors are a form of reflective glass, you can paint on mirrors just as you can paint on glass or walls or any other kind of surfaces. It is not possible however to paint a perfectly reflective surface onto a pain of glass or material.