热膨胀实验套装（金属球与环+气体膨胀演示器）

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• review_count：2340
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• time_range：{"from":"2026-06-26 02:53:20","to":"2026-06-26 02:53:20"}
• intros：{"brand_intro":"中科科教是国内知名的科学教育器材品牌，依托中科院科研背景，专注于K-12物理、化学实验教具的研发与生产。品牌以\"让科学触手可及\"为理念，产品严格遵循国家教学大纲，兼具安全性与趣味性，在中小学校及家庭科学教育领域拥有极高口碑。","product_intro":"本套件包含经典金属球与环（演示固体受热膨胀）、气体膨胀演示瓶（带密封活塞）、液体膨胀温度计模型及配套酒精灯、三脚架。通过直观的\"球卡环\"现象和液柱升降，帮助学生理解热胀冷缩原理。所有金属件采用黄铜镀镍处理，耐腐蚀且边缘光滑，适合8-15岁学生独立操作。","key_specs":["适用年龄：8-15岁","组件数量：6件（含酒精灯、防护垫）","金属球直径：25mm，环内径：24.5mm","气体膨胀瓶容积：150ml","材质：黄铜镀镍、高硼硅玻璃","安全设计：酒精灯带熄火盖，防烫手柄"]}
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• kol_quotes：["\"中科这套实验盒，把课本上干巴巴的原理变成了孩子眼里的魔术。\"——@物理老师王小明","\"金属球加热后卡在环里那一瞬间，全班都'哇'了出来。\"——@科学奶爸老张"]
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