In this article, the author studys the properties of polypropylene fiber concreteinwater resources and hydropower engineering.
在本文中，笔者对水利水电工程中聚丙烯纤维混凝土的特性进行了研究。
2
A small dredger and other boats were used for remove of broken concreteinwater. The dredge of the main channel was finished only in 15 days.
用挖泥船，配合其他船只，进行水中清碴，用15天时间就把主航道疏通。
3
Where 50-kilogram king salmon once fought their way up waterfalls to lay their eggs in gravel beds, there now are only concrete walls holding back still water and deep beds of muddy deposits.