string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%B1%8B%E9%A1%B6%E5%85%89%E4%BC%8F%E9%87%8D%E9%87%8F%E8%AE%A1%E7%AE%97 => Failed to connect to 61.171.74.35 port 38027: Connection refused"
屋顶光伏重量计算
