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Spiral-flow aerator

by HU YUNKAI
Year of Publication 24.02.2016
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Patent
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Spiral -flow aeration machine

by ZUO HUAWEI
Year of Publication 13.04.2018
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Patent
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Spiral -flow aeration device

by Pang Pengyuan
Year of Publication 17.08.2016
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Patent
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Liftable spiral -flow aeration ware

by XU LI
Year of Publication 11.07.2017
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Patent
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