common battery type telephone 共电式电话
This method can decrease the costs of the carbon rod using in zinc chloride type paper-lined battery and break a new path for common soaking paraffin process in zinc type paper-lined battery.
本方法降低了锌型纸板电池碳棒的成本，闯出一条锌型纸板电池用的普通碳棒浸蜡工艺的新方法。
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