... perforated metal 冲孔网；穿孔金属板 perforated pipe 多孔管；穿孔管 perforated brick 多孔砖；散气砖；多孔空心砖 ...
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The numerical simulation of perforated tube muffler in this thesis can provide reference and new method for muffler design. It is of important reference value for improving the design and analysis of muffler.
本文对穿孔管的消声器进行数值仿真分析,为抗性消声器的设计提供了参考,并且为穿孔消声器的改进提供了新的思路与方法,对提高消声器的设计与分析水平具有一定的参考价值。
参考来源 - 抗性穿孔管消声器数值仿真研究·2,447,543篇论文数据，部分数据来源于NoteExpress
并对含有穿孔管声学元件的消声器进行传递损失计算和消声性能分析。
Their transmission losses are calculated, and their silencing of noise properties analyzed.
使用有限元法计算穿孔管消声器的传递损失，并与实验测量结果进行了比较，二者吻合良好。
The predicted transmission loss of perforated tube silencers using the finite element method and experimental results are compared and showed good agreement.
一个钢管的生产流程如下：圆管坯放在要被切割的高温轧制线上，继续升温，穿孔，轧制直到管坯大小基本成型。
The process of a pipe production is the following: a round cast workpiece is put onto a hot rolling line where it is cut, heated, stitched and rolled till a pipe of necessary size is ready.
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