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介绍了一种由程控单结晶体管触发晶闸管构成的送丝电路。该电路结构简单，调试方便，对输入电压要求范围宽，可适合多种送丝机的要求
A wire feeding circuit composed of thyristor triggered by a programmable single junction transistor is introduced. The circuit structure is simple, easy to debug, the input voltage range, can be suitable for a variety of wire feeder requirements