| 1 | Personal safety supply | [1] |
| 2 | Work Environment Safety Supply | [1] |
| 3 | Rectifying circuits | [1] |
| 4 | Screw Tightening Control and Equipment | [1] |
| 5 | Brazing and soldering materials | [1] |
| 6 | Serial and Parallel Regulation | [1] |
| 7 | Printed circuit | [1] |
| 8 | Plaque placement of materials | [1] |
| 9 | Linear power supplies | [1] |
| 10 | Switching power supplies | [1] |
| 11 | Placement of elements in the power supply box | [1] |
| 12 | Power supply testing | [1] |
| 13 | Circuit with the preparation of a printed circuit board pen | [1] |
| 14 | Exposure and ironing method for the preparation of printed circuit | [1] |