File:Erdwaermesondenbohrung01.JPG

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English: Drilling of a borehole for a vertical geothermal heat exchanger
Deutsch: Bohrung einer Erdwärmesonde
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Author Tetris L

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28 April 2009

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current19:26, 28 April 2009Thumbnail for version as of 19:26, 28 April 20091,600 × 1,200 (351 KB)Tetris L{{Information |Description={{en|1=Drilling of a borehole for a vertical geothermal heat exchanger}} {{de|1=Bohrung einer Erdwärmesonde}} |Source=Own work by uploader |Author=Tetris L |Date=2009-04-28 |Permission=

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