对冶炼中有害元素钾、钠、氟、硫的控制还缺乏有效手段，致使出现高炉利用系数偏低、高炉不畅和造成环境的严重污染。
Control on harmful elements such as K, Na, f, s in smelting is short of effective measures, which results in BF capacity factor low, BF process not smoothly and serious environment pollution.
在不同的温度条件下，测出三个不同批号头孢唑林钠样品的旋光度，求得温度系数K的数值。
Under different given temperature, optical rotations of the samples of cefazolin sodium of 3 different batch Numbers are measured. The values of the temperature coefficient K are calculated.
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