型号：LDM520 调别：Bb 外观：漆金/镀镍 材质：黄铜管体 蒙乃尔活塞 尺寸：管径12.4mm 喇叭口径255mm Key: Bb Model: LDM520 Finish: Paint gold /Nickel plating Material: Brass body Monel piston Size: Bore 12.4mm Bell Diameter 255mm
