网上买的对比了几家,这家算还OK,20元。http://ai.taobao.com/auction/edetail.htm?e=iUXj%2BcciRGDghojqVNxKsY7MqtQLXorgKww%2BJCCRHnuLltG5xFicOdXrTUTgh9sMDPIwxrc30ri4oBBMRS20l52vinUQ3SfNfTM12WKZxQsYu8JPV8XxlOIZWR1bMnHu&unid=13846234&ptype=100010&from=basic&clk1=1a9c99da56604f21f6fd764f1f4ad8d2&upsid=1a9c99da56604f21f6fd764f1f4ad8d2我现在用的这只好象有年多了
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