| 摘要 |
<p>A resonance and/or vibration measurement device comprising an elongate member, resonance and/or vibration measuring means and processing means, in which the resonance and/or vibration measuring means records resonance and/or vibration of the elongate member caused by the striking of a material in use, and the processing means is adapted to identify a predetermined characteristic of the material from the recorded resonance and/or vibration measurement.</p> |
