Through analysis and research on the noise and vibration in the test ground of vibratory road roller, measures have been taken to lower the noise and vibration level and good effect has been resulted.
对压路机试车场噪声与振动进行分析研究，采取几项措施的综合治理，试车场的减振降噪取得较好的效果。
Then, the advantage and shortcoming of two recent methods of flight test for ground effect, and the technical problems in implementation, are review emphatically.
然后，着重评述现有两种典型地面效应试飞方法的优缺点及其实施中的技术问题。
The altitude effect on aero-engine ground test performance was analyzed in brief, and the advantages-disadvantages of the two methods used for the analysis of this effect were compared.
本文简要分析了海拔高度对航空发动机地面试验性能的影响和研究该影响的两种方法的优缺点。
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