string(242) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=32%E7%9A%84%E6%B3%A2%E7%BA%B9%E7%AE%A1%E5%86%85%E7%BB%8F%E5%B0%BA%E5%AF%B8 => Failed to connect to 101.89.117.144 port 38017: Connection refused"
32的波纹管内经尺寸
