重构计算器API，通过输入干成分质量与稀释剂体积，计算药物溶液的重构浓度，支持药物配制和其他日常应用场景，实现精确剂量与浓度计算。
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"chinaHotValueDouble": 0,
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中和计算器API工具，分析酸碱中和反应，计算溶液当量浓度与物质当量重量。适用于化学反应分析，提供便捷计算功能。
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"selectedValueDouble": 691,
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水硬度计算器API产品，通过输入水中钙镁浓度，使用公式硬度=Cal×2.497+Mg×4.118计算水硬度（mg-CaCo₃/L），帮助用户估算水质硬度并进行分类。
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"selectedValueDouble": 691,
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百分比溶液计算器帮助计算溶液浓度，可用于质量百分比和体积百分比计算。输入溶质质量和溶液体积，立即获取浓度百分比等多种结果。
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