| 摘要 |
PURPOSE: An application teaching material for educating the property of piezoelectric element is provided to maximize the learning efficiency on the piezoelectricity phenomenon. CONSTITUTION: A base comprises a model(230) of particular shape. The book(300, 300') comprise a pair of cups, electrodes, and a piezo-electric materials. A pair of cups is arranged on the front base of the body(100). The electrode is laminated on the top of the cup. Accordingly, this invention has an advantage. |
