Reductive bleaching is also carried out, using sodium hydrosulphite.
用连二亚硫酸钠也进行了还原漂白。
Bleaching is their basic process of formation. The key crux is the reductive bleaching of iron and manganese.
白鳝泥是其基本形成过程，实质是铁、锰的还原性淋溶。
Bleaching is their basic process of formation. The key crux is the reductive bleaching of iron and manganese.
白鳝泥是其基本形成过程，实质是铁、锰的还原性淋溶。
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