'æåip181 http://www.ip181.com/
:param days:
:return:'

@staticmethod
@robustCrawl
def freeProxyThird(days=1):

    url = 'http://www.ip181.com/'
    html_tree = getHtmlTree(url)
    tr_list = html_tree.xpath('//tr')[1:]
    for tr in tr_list:
        (yield ':'.join(tr.xpath('./td/text()')[0:2]))
