用一个清洗工业零件的超声波头子,放到水里,飘上来的都是小鱼,大鱼大概不怕超声波,不过那水混得连死鱼都看不见。
用一个清洗工业零件的超声波头子,放到水里,飘上来的都是小鱼,大鱼大概不怕超声波,不过那水混得连死鱼都看不见。
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