A device that reduces the effect of waves on a ship.
Fish・魚介類の養殖と有機JASの家畜の糞 https://aon.tokyo/fish/
Rice・米より儲かる話 https://aon.tokyo/rice/
Food・食料危機 https://aon.tokyo/food/
有機JAS https://aon.tokyo/jas/
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