The working principle of machine tool typical structure and driving system is complicated and abstract,so it is jejune for teacher to teach and it is difficult for students to learn.
英
美
释义
机床典型结构的工作原理和传动系统比较复杂抽象,教师讲解起来枯燥呆板,学生学起来较难,教学效果较差。
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