求翻译：3、实习内容：数字电路实习、电工实习、变频调速实习、PLC编程与实习、单片机编程与控制实习、传感器实习、数控车、数控铣、线切割、电火花的操作与加工工艺等。是什么意思？

3, attachment content: digital circuit training, electrician training, practice frequency control, PLC programming and practice, practice and control of microcontroller programming, sensor training, CNC lathes, CNC milling, wire cutting, EDM operation and processing techniques.

Content: digital circuits 3, internships internship, electrician trainee, frequency conuersion internship, PLC programming and internships, microcontroller and control of apprenticeship, sensors internship, numerical control, CNC milling, wire cutting, electrodischarge machining (EDM) Operating and

3rd, practice content: The digital circuit practice, the electrician practise, the frequency conversion velocity modulation practice, the PLC programming and the practice, the monolithic integrated circuit programming and the control practice, the sensor practice, the numerical control vehicle, the

3, practice: digital circuit practice, electrical practice, PLC programming, frequency conversion speed regulation practice and internships, microcontroller programming, sensors and control practice internship, NC lathe, CNC milling, wire EDM, EDM operation and process technology, and so on.

3rd, practice content: The digital circuit practice, the electrician practise, the frequency conversion velocity modulation practice, the PLC programming and the practice, the monolithic integrated circuit programming and the control practice, the sensor practice, the numerical control vehicle, the