primary battery tester battery simulation copper zinc electrode copper zinc iron three electrode pieces teaching demonstration physical experiment_青华科教仪器有限公司

primary battery tester battery simulation copper zinc electrode copper zinc iron three electrode pieces teaching demonstration physical experiment

primary battery tester battery simulation copper zinc electrode copper zinc iron three electrode pieces teaching demonstration physical experiment

原电池实验器电池模拟铜锌电极铜锌铁3种电极片教学演示物理实验

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