The results show that the method adopted can effectively suppress the radiated noise from cover surface.
结果表明，采用的方法能有效抑制飞轮壳的表面辐射噪声。
The utility model is characterized in that the middle position of the cover surface is provided with at least one convex part.
其特征在于所述的罩面的中间部位设置至少一个突出部分。
Closure cover system is one of important parts of landfill site construction, it includes landfill gas discharge guiding layer, geotechnical film, drainage layer and plant cover surface soil layer.
封场覆盖系统是垃圾卫生填埋场建设的重要组成部分，覆盖系统包括气体导排层、土工膜、排水层、植被表土层。
Closure cover system is one of important parts of landfill site construction, it includes landfill gas discharge guiding layer, geotechnical film, drainage layer and plant cover surface soil layer.
封场覆盖系统是垃圾卫生填埋场建设的重要组成部分，覆盖系统包括气体导排层、土工膜、排水层、植被表土层。
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