重锤式拖网取样器是对现行常规拖网的技术改进。
Hammer dredge is a technical improvement of the existing dredge sampler.
拖网的定义是一张网沿著河底或湖底拖拉，以起可能停留在那里的任何东西。
The definition of a dragnet is a net that is pulled along the bottom of a river or lake to bring up anything that may lie there.
在因吉利海峡西部，多佛比目鱼正在被一种光波拖网的毁灭式捕鱼方法捕捉。爱尔兰海以及爱尔兰西南部和西部曾被列为鱼的避难所。
Dover sole caught by the destructive method of beam trawling in the western English Channel, the Irish Sea and south-west and west Ireland has been listed as a fish to avoid.
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