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暖手宝换水后加多少盐

更新时间: 2020-10-29 00:00:00     

1、水加食用盐,增加其导电率,每斤水加一汤匙盐就可减小水的电阻值即可。

2、醋酸钠的简单家庭制法,用醋精(没有的话用白醋也差不多)和纯碱(苏打)或小苏打混合反应即可,不要用红醋,有机物太多,在这里用调制醋比酿造醋好。

关键词: 多少

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