雅马哈五线谱教学挂图（标准版）

评测依据

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• intros：{"brand_intro":"雅马哈（Yamaha）是全球知名的乐器与音响品牌，成立于1887年，总部位于日本滨松。品牌以卓越的声学技术和精湛工艺闻名，产品涵盖钢琴、电子琴、管乐器、音响设备及音乐教育用品，在全球音乐教育领域拥有极高的权威性和影响力。","product_intro":"雅马哈五线谱挂图采用专业级PVC材质，尺寸为80×120cm，表面防反光处理，适合大型教室和音乐厅使用。五线谱线条采用精密丝印工艺，宽度和间距严格遵循国际标准。挂图配有铝合金挂杆和可调节挂钩，安装稳固，可长期悬挂。","key_specs":["适用对象：专业音乐院校、音乐厅、大型培训机构","尺寸：80×120cm","材质：PVC（防反光、阻燃）","印刷工艺：精密丝印，线条公差±0.05mm","固定方式：铝合金挂杆+可调节挂钩"]}
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