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通过对氩弧焊的介绍及该焊接系统的特点，提出ＰＬＣ的控制方案及完成该方案的硬件电路框图和软件编制方法，缩短了研制和开发该系统的周期。
By introducing the TIG welding and the characteristics of the welding system, the control scheme of PLC and the hardware circuit diagram and software compilation method of the scheme are put forward, which shortens the cycle of developing and developing the system.