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kaiguan
- 光电接近开关原理和电路,有比较详细的电路分析-Photoelectric proximity switches and circuit theory, there is a more detailed circuit analysis
1.5V~30V-3A-kaiguan-dianyuan
- 这里面是开关电源的原理及应用，以及PCB。-It is the principle and application of switch power supply, and paper.