string(277) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cad%E6%96%87%E4%BB%B6%E5%BE%88%E5%A4%A7%E6%80%8E%E4%B9%88%E5%A4%84%E7%90%86%E4%B8%8D%E4%BA%86%E5%9B%BE%E7%BA%B8 => Failed to connect to 14.116.215.7 port 38225: Connection refused"
cad文件很大怎么处理不了图纸
