短語詞組短語bottom otter trawl 底層單拖網(wǎng)otter trawl shrimp vessel 單拖網(wǎng)捕蝦船otter trawl fishery 單拖漁業(yè)box -type otter trawl net 四片型拖網(wǎng)具 返回 otter trawl