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device for oxygenating the water of ponds for fish farming
device for oxygenating the water of ponds for fish farming
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机译:给池塘养鱼的水充氧的装置
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摘要
this is a new device for oxygenation of the water for the intensive rearing of fish.the device includes a series of vertical shafts which are water each to a dish, which causes the opening of the water jet with simultaneous oxygenation of the same.
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