求翻译：计算期为12年，建设期2年，生产期为10年，建筑工程折旧年限为20年，设备折旧年限为15年。递延资产摊销为5年。是什么意思？

Calculation period of 12 years, 2-year construction period, the production period of 10 years, construction depreciable life of 20 years, equipment depreciation period of 15 years. Amortization of deferred assets for five years.

calculations for periods of 12 years and the construction period for 2 years and production for 10 to 20, and construction depreciable life, depreciation of equipment for 15 years. deferred assets Amortization for 5 years.

The computation time is 12 years, the construction period 2 years, the productive phase is 10 years, the architectural engineering depreciation age limit is 20 years, the equipment amortizes the age limit is 15 years.Hands over extends the property amortization is 5 years.

Calculation period is 12, construction period is 2 years, for a period of 10, building depreciation for 20 years, equipment depreciation period of 15 years. Amortization of deferred assets for 5 years.

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