三峡水库运行调度受防洪要求控制，水库必须在汛前泄降。
The reservoir operation is controlled by flood prevention demanding, and the reservoir level must be descended before flood season.
是一种新型的专门用于汛期抗洪抢险、汛前、汛后堤防加固维护，江河湖堤岸的打桩机械。
Is a new kind of specialized for flood fighting and emergencyoperations, concerned, embankment reinforcement after maintenance, sin lakeriver embankment of piling machinery.
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