税务机关允许此类机器年折旧率最大为 20%。

The tax authority allows a maximum of 20% yearly depreciation on this type of machine.

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在前两年，企业决定使用10%的折旧率，2010年，企业决定用15%的折旧率。

In the first two years the business decided to use 10%. Now, in 2010, the owner is thinking of using 15%.

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约翰逊还提供了估算成本的成本明细表，实际上需要20年的维护成本，现值折旧率为5%。

Johnson also offers a cost breakdown of how that cost works. And yes, it's actually a 20-year cost, discounted back to present value using a 5% discount rate.

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