求翻译：本次毕业设计主要通过对EL1513泵车回转减速器进行测绘研究，学习国外先进的制造技术，从而研发出我们自己的产品。在设计过程中，首先进行了传动方案的评述，选择齿轮减速器作为传动装置，然后进行减速器的设计计算（包括设计齿轮传动、轴的结构设计、选择并验算滚动轴承、选择并验算联轴器、校核平键联接、选择齿轮传动和轴承的润滑方式等几部分内容）。运用AutoCAD软件进行齿轮减速器的二维平面设计，完成齿轮减速器的二维平面零件图和装配图的绘制。是什么意思？

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