3967 - 3970: 产品细节图：[展示大颗粒状干冰的图片] 产品性能：大颗粒干冰，冷却效果持久。 用材：优质二氧化碳。 参数表： 型号：JW-1kg-L-20kg - JW-1kg-L-500kg 颗粒大小：大颗粒 重量：20kg - 500kg 型号：JW-1kg-L-20kg - JW-1kg-L-500kg 用途：适用于需要长时间冷却的场合，如工业制冷。 包装：密封包装，保证干冰品质。 使用说明：使用时注意安全，防止冻伤。 售后服务：提供及时的售后服务，确保用户满意。 Product Details Image: [Show the picture of large granular dry ice] Product Performance: Large granular dry ice has a lasting cooling effect. Materials Used: High-quality carbon dioxide. Parameter Table: Model: JW-1kg-L-20kg - JW-1kg-L-500kg Particle Size: Large Particle Weight: 20kg - 500kg Model: JW-1kg-L-20kg - JW-1kg-L-500kg Usage: Suitable for occasions that require long-term cooling, such as industrial refrigeration. Packaging: Sealed packaging to ensure the quality of dry ice. Instructions for Use: Pay attention to safety when using it to prevent frostbite. After-sales Service: Provide timely after-sales service to ensure user satisfaction.