Combined with design practice of pavement drainage in Zhumadian, its importance is elaborated and problems in pavement seepage prevention are proposed which could provide references.
结合驻马店市道路路面排水设计的实际，阐述了路面排水设计和施工的重要性，提出了预防路面渗水要解决的有关问题，具有一定的参考价值。
Combined practice, the technology difficulties of sheet forgings with inner hole were introduced, for which the optimized design of dies for punching and cutting for top-plate forging was put forward.
结合实际，介绍了带内孔的薄板锻件的工艺难点，并就此工艺难点的解决介绍了锻件切边、冲孔模具的优化设计。
Parametric design combined with mechanical engineering practice, the issue that transforms a draft drawing into a parametric drawing program is put forward and researched deeply.
结合参数化设计和机械工程的实际，提出并深入研究了从静态草图到参数化绘图程序的自动转换问题。
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