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Kalkulator powierzchni dachu
Jak obliczyć powierzchnię dachu?


Kalkulator umożliwia obliczenie powierzchni dachowych w wariantach : jednospadowy, dwuspadowy, trzyspadowy, czterospadowy.
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Number of wallpapers
Jak oszacować niezbędną ilość tapety?
Ile kupić tapety?
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Calculator to estimate the necessary amount of wallpaper needed to wytapetowania room of the given dimensions.
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ROCE - an indicator of the efficiency of investment
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Verifier numbers EAN-8 preview
Verifier numbers EAN-8
Calculator allows you to verify the number entered EAN-8.