商用车发动机在怠速和工作中会产生较大的振动和噪声，分析其相关零部件的振动特性就显得尤为重要。
The libration characteristic of the commercial engine parts is in great importance because of the libration and noise in the idle Speed and working process.
商用车发动机在怠速和工作中会产生较大的振动和噪声，分析其相关零部件的振动特性就显得尤为重要。
The libration characteristic of the commercial engine parts is in great importance because of the libration and noise in the idle Speed and working process.
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