其分析结果表明改进效果良好，排气歧管罩的辐射噪声得到明显降低。
The analysis of the improved structure shows that the measures are effective, the radiate noise of the cover is decreased distinctly.
其分析结果表明改进效果良好，排气歧管罩的辐射噪声得到明显降低。
The analysis of the improved structure shows that the measures are effective, the radiate noise of the cover is decreased distinctly.
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