string(220) "get document error:https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=ad20%E5%8E%9F%E7%90%86%E5%9B%BE%E7%94%9F%E6%88%90pcb => Failed to connect to 101.89.143.195 port 38175: Connection refused" ad20原理图生成pcb

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ad20原理图生成pcb