本文对卷筒纸胶印机进行了系统的研究。
This paper provides a systematical research about the web-offset -printing machines.
在实验方面，探索了适用于卷筒纸胶印机的模态试验方法，测得了三台胶印机的模态参数。
Experimentally, a suitable modal analysis method for the web-offset-printing machines is found out, and the modal parameters of the three web-offset-printing machines have been identified.
本文第一部分介绍了北人生产的PZ4880卷筒纸平版胶印机的横向套印超标偏差问题，并对此问题提出了技改方案，达到了预期效果；
The first part of essay is about cross-trapping broad deviation of Beiren PZ4880 web offset press and advances the technology enhancement resolution, which achieves the proleptic result.
本文第一部分介绍了北人生产的PZ4880卷筒纸平版胶印机的横向套印超标偏差问题，并对此问题提出了技改方案，达到了预期效果；
The first part of essay is about cross-trapping broad deviation of Beiren PZ4880 web offset press and advances the technology enhancement resolution, which achieves the proleptic result.
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