下水道和排水管老化不堪，超负荷运作。 电力、水利和下水道设施在洪水面前不堪一击。
Sewers and drains have become antiquated and overloaded, and power, water and sewage plants too susceptible to floods.
在水电站机组丢弃负荷情况下，利用特征线法计算管道内的水击荷载时间历程。
The time history of water hammer in pipeline in the condition of unit emergency load dump is calculated by characteristic line method.
机组采用高性能涡旋压缩机兼用防液击低负荷启动装置，使制冷的核心部份的寿命大大提高。
Unit by high performance liquid strike prevention scroll compressor saut low-load start-up device, make refrigeration core part of the life is greatly increased.
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