结果表明，金属流动曲线起伏很大。
The results indicate that the metal flow curve wavily fluctuates.
隆起曲线与偏移曲线起伏相对应。
The waves of the heave curve and the deviation curve are in correspondence.
摘要：针对分布反馈式(DFB)光纤激光器用于水声探测时频响曲线起伏较大的问题，设计了一种开孔套管式封装结构。
Abstract: To reduce the fluctuation of frequency response of a Distributed Feedback (DFB) fiber laser used in underwater sound detection, an encapsulated structure with orifices was designed.
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