扬声器系统设计手册 50元
http://www.amazon.cn/%E6%89%AC%E5%A3%B0%E5%99%A8%E7%B3%BB%E7%BB%9F%E8%AE%BE%E8%AE%A1%E6%89%8B%E5%86%8C-%E8%BF%AA%E5%85%8B%E6%A0%BC%E6%A3%AE/dp/B005J5EQ7O/ref=sr_1_1?ie=UTF8&qid=1379244459&sr=8-1&keywords=%E6%89%AC%E5%A3%B0%E5%99%A8%E7%B3%BB%E7%BB%9F%E8%AE%BE%E8%AE%A1%E6%89%8B%E5%86%8C
包不包邮啊?