string(274) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%A3%8E%E5%8A%9B%E5%8F%91%E7%94%B5%E6%9C%BA%E8%BD%AC%E4%B8%80%E5%9C%88%E6%98%AF%E5%A4%9A%E5%B0%91%E5%BA%A6 => Failed to connect to 14.116.215.7 port 38225: Connection refused"
风力发电机转一圈是多少度
