More practically, considering DOS shell of laser as non-perfect one, or supposing that DOS shell is separated from the laser, we can obtain more significative results.

为使理论计算更接近实际，将外加金属包壳视为非理想导体，或将金属包壳与激光器结构隔开，分别对这两种情况下的结果进行了讨论。

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Many enterprises still use DOS-based apps in a shell today.

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