The material utilization ratio is the core of technology indexes.

技术指标的核心是材料利用率。

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How to give the hedge ratio is the core problem.

如何确定套期保值的比率是套期保值的核心问题。

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How to give the hedge ratio is the core problem.

如何确定套期保值的比率是套期保值的核心问题。

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