string(261) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%80%8E%E4%B9%88%E5%BD%BB%E5%BA%95%E6%B8%85%E9%99%A4cad%E6%96%87%E4%BB%B6%E5%86%85%E5%AE%B9 => Failed to connect to 101.89.159.206 port 38075: Connection refused"
怎么彻底清除cad文件内容
