通过LF精炼炉与成分快速分析相结合，进行钢水成分微调，从而控制钢的成分波动范围；
To adjust finely the composition of molten steel by combining LF finery with fast analysis of composition, the composition control in a limited scope can be realized.
达·芬奇可能有意选用了不同的油彩配方——或者他有可能在几年后对作品进行了微调，而他所喜爱的油彩成分发生了变化。
Da Vinci might have selected different glaze recipes on purpose-or he may have tweaked the painting over years during which time his taste in glaze ingredients could have changed.
分别熔炼钢水及合金，合兑后简单微调成分即进行VOD操作。
The steel and alloy have been smelted separately, then after mixing process the composition has been fine adjusted(that is VOD process).
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