Synthetic frames
The synthetic frames (pvc) are used more and more in our country. The main reason is that the synthetic frames of in combination other type frames are up to 20% more economically and the himself qualitatively.
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Wooden frames
In Greece the timber as material of manufacture exterior and internal frames is first and for a lot of years the prevailing choice for the constructors and the users of buildings of residence. It is usually selected in buildings of residence for the heat
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