string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%8E%A8%E5%B9%BFpos%E6%9C%BA%E6%98%AF%E4%BB%80%E4%B9%88%E5%B7%A5%E4%BD%9C => Failed to connect to 14.18.46.51 port 38206: Connection refused"
推广pos机是什么工作
