| Schematic sketch – process procedure:
01 – Gas cylinder (Nitrogen or Air)
02 – combi. Compressor/Elektric-generator
03 – Elektric hose reel and depth gauge
04 – Control unit
05 – Tripod with pulley
06 – Compressed-air hose
07 – Puls generator
08 – Underground pump / Airlift
09 – Filter pipe with gravel filling
10 – Water-bearing Stratum
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