So the ANSI lumen spec, when measured under these conditions, does not accurately reflect the actual brightness the user will get in normal operation.

所以在这些条件下测得的ANSI流明参数并不能精确的反应用户在正常使用环境下获得的实际亮度。

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The preparation method utilizes industrial sulfuric acid to leach waste iron residue in oxygen and at normal pressure under reasonable production process and operation conditions.

介绍了以废铁渣为主要原料与工业硫酸反应制备三氧化二铁，产生的废液加氧化钙生成副产物硫酸钙的工艺。

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