<p style="margin: 0cm 0cm 0pt;" class="MsoNormal"><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;">我简单介绍一下钢琴的磁力击弦机系统，首先，欧洲名琴</span><span lang="EN-US"><span st