It is not an approximate value.

它不是一个近似值。

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But this process needs the well testing data and the aid of computer. It is inconvenient to apply on the spot, and the calculation result is an approximate value.

这一过程需要输入测斜数据后利用计算机辅助进行，在现场应用中很不方便，且由于受各种因素的影响，其计算结果仍然是一个近似值。

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The support brackets are simulated by springs when calculating shock response of a ship shaft system, and the stiffness of spring usually takes an approximate value.

对船舶轴系进行冲击响应计算，通常在轴架支承处采用弹性边界处理，取一个近似的支承静刚度。

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The fund currently trades at an approximate 20% discount to the underlying net asset value of its portfolio.

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