麻烦高手帮我用英文翻译一下毕业论文摘要！不胜感激！急~~_百度知道

Ordinary tremella determination sulfite remainder. Through the hydrochloric acid vice rose by L9 (aniline method, 33) orthogonal test, the affecting factors of sodium chloride mercury four PH value, sample in four chlorine gong sodium absorbing liquid immersion time, sample with the temperature of the liquid is optimized and the residues of sulphites in as the evaluation index, with spectrophotometer were developed extraction sulphite optimal conditions.

摘 要 本论文介绍了PLC的特点及发展趋势，阐述了液压机在国内外发展的状况和预测。并详述了YS32G-630C液压机的工作原理及其特点，对该液压机的主电路图、控制电路图以及液压系统工作原理进行了详细的分析。本文提出了传统液压机的继电器—接触器电气控制系统存在的一些问题，并提出了较好的改造方案。通过运用可编程控制器（PLC）来代替传统的继电器—接触器控制方式，使系统控制更加简单易懂，操作更加灵活方便。文中从硬件设计和软件设计两个方面论述了系统的改造方案。在硬件线路设计方面，阐述了系统改造的思路和改造的内容，并对PLC的选择和PLC控制系统的接线设计做了详细的说明。在软件线路设计方面，根据液压机的工作流程图和控制电路图，论述了程序设计的思路及其设计方案，并绘制了程序的梯形图。在论文最后对PLC控制系统设计中的干扰问题进行了简单的论述。在现代企业中，可编程控制器以其功能强大、通用见效快、环境适应性好、编程简单等一系列优点在各种机床中已经得到了广泛的应用。 Abstract This paper introduced the PLC and the characteristics of the development trend on the hydraulic press in the development of domestic and international situation and forecast. And detailed the YS32G-630C hydraulic principle and the characteristics of the hydraulic machine's main circuit, the control circuit and the principle of the hydraulic system carried out a detailed analysis. This paper presents the traditional hydraulic machine relay - contact with electrical control system for a number of issues and made a better rehabilitation programmes. Through the use of programmable logic controller (PLC) to replace the traditional relay - access control, allowing the system to control more easy-to-understand, the operation more flexible. In the design of hardware and software design of the system on two aspects of the transformation programme. On the hardware circuit design, described the system of ideas and transform the content and the choice of PLC and the PLC control system wiring design done a detailed explanation. In line design software, according to the work of hydraulic flow chart and control circuit, discussed the idea of the design process and its design, and the mapping of the procedures ladder. Papers in the final of the PLC control system design of the interference problem for a simple exposition. In modern enterprises, the PLC with its powerful, universal quick, environmental adaptation, and simple programming and a series of advantages in a variety of machine tools has been widely used.