发明授权
US4073079A Device for pumping out sanded in crab pots 失效
用于在螃蟹盆中抽出的装置

Device for pumping out sanded in crab pots
摘要:
A nozzle pipe has upper and lower guide rings to guide the nozzle down a pot line to the crab pot. A hydraulic pump on the pipe discharges a jet of sea water to wash away drifted sand which anchors the crab pot to the sea bottom. The pump is driven by a hydraulic motor powered by a hydraulic system on a ship whereby the hydraulic motor circuit is not affected by the sea water pressure.
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