Handheld personal digital processing system, realize the mail list, calendar, calculator, electronic drawing board function.
说明：掌上个人数字处理系统，实现通讯录、日历、计算器、电子画板功能。
Know the function of electronic components and can understand electrical principle drawing.
熟悉各电子元器件的功能及能够看懂电气原理图。
It is essential for electronic major students to master the course of Circuit Drawing CAD.
对电子类专业学生来讲，掌握电路制图CAD这一课程非常必要。
It is essential for electronic major students to master the course of Circuit Drawing CAD.
对电子类专业学生来讲，掌握电路制图CAD这一课程非常必要。
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