大学生活不舒服，材料英语和制图，各科考试不能糊，进步！
University life uncomfortable, materials in English and mapping, test subjects can not paste, progress!
如：机械制图，金属材料工艺学公差等以学过的理论知识。
Such as: Machine graphics, the metals material craft learns the theories knowledge that business trip etc. already learn.
填充图剖面符号是机械制图、建筑制图中实体剖视图必不可少的材料标识。
The cross-section symbol of the pattern fill is a necessary material marker for the cross-sectional view of the solid object.
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