650 Cello String Set 单一的字符串: a -651 -镀铬钢板缠绕在全钢芯上 D-652 -镀铬钢板缠绕在全钢芯上 G-653 -镀铬钢板缠绕在全钢芯上 C-654 -镀铬钢板缠绕在全钢芯上
