string(279) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cad%E6%89%93%E5%BC%80%E5%9B%BE%E7%BA%B8%E6%98%BE%E7%A4%BA%E4%B8%8D%E5%AE%8C%E6%95%B4%E6%80%8E%E4%B9%88%E5%8A%9E => Failed to connect to 101.89.143.195 port 38175: Connection refused"
cad打开图纸显示不完整怎么办
