New boreholes into old gallery: Unterschied zwischen den Versionen
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(Die Seite wurde neu angelegt: „In the old days was closed mine without degassing devices. Therefore, new access have to be created now in order to extract the gas in a controled way.“) |
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In the old days was closed mine without degassing devices. Therefore, new access have to be created now in order to extract the gas in a controled way. | In the old days was closed mine without degassing devices. Therefore, new access have to be created now in order to extract the gas in a controled way. | ||
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| + | [[Bild:Borehole_abandoned-mine.jpg | Drilling into an abandoned mine ]] | ||
Version vom 9. Mai 2012, 15:01 Uhr
In the old days was closed mine without degassing devices. Therefore, new access have to be created now in order to extract the gas in a controled way.
