exploitation of the sea-bed

Searched for exploitation of the sea-bed in the dictionary.
German: Nutzung des Meeresbodens, French: exploitation des fonds marins, Spanish: explotación de los fondos marinos, Italian: sfruttamento dei fondali marini, Greek: εκμετάλλευση τoυ θαλάσσιoυ πυθμέvα

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