Braiding Research - Example1

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http://image.baidu.com/i?ct=503316480&z=0&tn=baiduimagedetail&word=%B1%B1%BE%A9%C1%A2%BD%BB%C7%C5%CD%BC%C6%AC&in=24752&cl=2&cm=1&sc=0&lm=-1&pn=34&rn=1&di=485341641&ln=241&fr=#pn46

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http://image.baidu.com/i?ct=503316480&z=0&tn=baiduimagedetail&word=%B1%B1%BE%A9%C1%A2%BD%BB%C7%C5%CD%BC%C6%AC&in=24752&cl=2&cm=1&sc=0&lm=-1&pn=34&rn=1&di=485341641&ln=241&fr=