A mineral substance containing ferrous sulphate and other metal salts formerly used as a precipitant in the treatment of sewage.
单词 | θ61671 |
释义 | the world > physical sensation > cleanness and dirtiness > sanitation > provision of sewers > sewage treatment > [noun] > substance for treating sewage (1) ferozone1888 A mineral substance containing ferrous sulphate and other metal salts formerly used as a precipitant in the treatment of sewage. |
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