售50/本。全新。可虾皮。不议价:)
http://i.imgur.com/PpOAjJp.jpg
http://i.imgur.com/mA1Hg0M.jpg
详细介绍可参考
http://babybox.pixnet.net/blog/post/43235422-%E6%89%93%E7%99%BC%E6%99%82%E9%96
%93%E7%9A%84%E5%A5%BD%E5%B7%A5%E5%85%B7-(1)%EF%BC%9Akumon%E5%8A%9F%E6%96%87%E3
%80%81%E5%8B%9E%E4%BD%9C%E6%9B%B8