鱼骨坝束窄了河道过水断面，引起坝体两侧水流流速的增大，坝田内流速则大幅度减小；
Alongside the dike, the flow velocity gets larger, and it is on the contrary in the dike field.
根据大源渡枢纽施工导流模型试验结果，着重分析了一期施工期间利用束窄后河道泄流及通航的水流条件。
Based on the experimental result of construction river diversion model of Dayuandu, this paper studies the flow condition for navigation and drainage in first construction period.
这项技术的原理是将声音压缩成类似于光的窄束。
The technology works by focusing sound into a narrow beam, just like light.
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