PETROLEUM EXTRACTION BY FLOW OF OIL FROM BOREHOLE UNDER NATURAL PRESSURE (MINING)
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BTPETROLEUM EXTRACTION + WORKING OF MINERAL OIL DEPOSITS (MINING)
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UDC622.276.2
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Descriptor GERERDÖLGEWINNUNG DURCH NATÜRLICHEN DRUCK, ZUFLUSS DES ÖLS ZUM BOHRLOCH (BERGBAU)
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Descriptor ENGPETROLEUM EXTRACTION BY FLOW OF OIL FROM BOREHOLE UNDER NATURAL PRESSURE (MINING)
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Descriptor FREEXTRACTION PAR AFFLUX DE PÉTROLE AU TROU DE FORAGE, SOUS PRESSION NATURELLE (INDUSTRIE MINIÈRE)
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Variant GERERDÖLGEWINNUNG/DURCH NATÜRLICHEN ÖLZUFLUSS ZUM BOHRLOCH (BERGBAU)
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Variant ENGPETROLEUM EXTRACTION/OIL FLOW UNDER NATURAL PRESSURE (MINING)
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Variant FREEXTRACTION DE PETROLE PAR ECOULEMENT NATUREL DU PETROLE AU TROU DE SONDAGE (INDUSTRIE MINIÈRE)
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NTPETROLEUM EXTRACTION/BY WATER PRESSURE, NATURAL PRESSURE (MINING)