To fill in a bill, Chinese ink or a carbon pen should be used.
填写票据应使用墨汁或碳素笔。
The carbon black dispersion for aqueous ink was prepared by sand mill.
通过砂磨分散研制了配制水性墨水用得水性炭黑色浆。
A Study on the Effect of Carbon Black Pigment on the Curing Rate of UV Ink
碳黑颜料对紫外线油墨固化速度影响的研究
Is the date and time that the carbon ink expires after preparation specified on its container ?
碳墨得有效日期是否有标示在容器外?
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