standard working solution
standard working solution
标准工作溶液
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Use a conical flask to fix the volume, addition of a working solution of known concentration by several times can prepare a standard series.
采用一个小锥形瓶固定其体积，便一定浓度的工作溶液添加数次便可获得一系列标准系列。
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