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.
本文主要介绍了变频器在国产单双色单张纸平版印刷机改造中的应用，以及对变频器的一些功能的要求。
The paper introduces the application of inverter in the reform of homemade single - double-color singleton paper lithography machine, followed with some functional demands for inverter.
准备及操作卷筒给纸式柯式平版印刷机包括印报章用的柯式轮转印刷机。
Sets up and operates web-fed offset printing machines including newspaper printing machines.
在印刷包装业对各种印刷设备的需求中，量大面广的印刷设备是单张纸平版印刷机、卷筒纸平版印刷机、卷筒纸凹版印刷机和柔性版印刷机。
The sheet feed press, web offset press, web gravure press and flexographic press are the most widely used in printing newspapers, magazines, books, advertisements and packaging papers.
在印刷包装业对各种印刷设备的需求中，量大面广的印刷设备是单张纸平版印刷机、卷筒纸平版印刷机、卷筒纸凹版印刷机和柔性版印刷机。
The sheet feed press, web offset press, web gravure press and flexographic press are the most widely used in printing newspapers, magazines, books, advertisements and packaging papers.
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