Cost and earned value: To maintain control over expenditures throughout the project lifecycle.

成本和盈利值：为了维护对整个项目周期开销的控制。

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Dimension error prediction and compensation for boring is a cost effective method to control the dimension distribution and maintain part exchangeability.

镗孔加工尺寸误差预测补偿是控制镗孔加工尺寸分散度、保证零件互换性的一种经济、有效的方法。

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Even if we give them the benefit of the doubt and believe they maintain such a policy for idealistic reasons, the fact is such a strict environmental policy is also a great cost-control strategy.

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