ترجمة قادُوس قاموس الإنجليزية العربية Glosbe
During the past 40 years three basic design concepts for mining technology have been pursued picking up nodules with a dredge type collector and lifting them through a pipe picking them up with a bucket type collector and dragging the bucket up with a rope or cable and picking up nodules with a dredge type collector and allowing the collector to ascend by the force of its own buoyancy