maintainable period of freezing wall

例句：

1. 1.The design of the building is very practical, with a maintainable period of 20 years.
   这座建筑的设计非常实用，有20年的可维护期。
2. 2. The company's product has a maintainable period of 5 years, which is longer than many competitors.
   该公司的产品有5年的可维护期，比许多竞争对手都要长。
3. 3. The engineer explained that the main reason for the failure was due to the poor maintenance of the equipment.
   工程师解释说，设备失败的主要原因是因为设备的维护不当。