| 摘要 |
<p>The device has one or multiple electric heating elements which are fixed to the harmonica or embedded in the harmonica or are provided for the additional installation in the harmonica or the additional attachment at the harmonica in such a way that effective heat conduction persists between the heating elements and the fixed plates of the harmonica. The device conserves the required electric energy from an external power source by a power current cable.</p> |
