激光雕刻不使用油墨，留下永久的标记，一般对环境有益。
Engraving lasers do not use ink, leave a permanent mark and are generally good for the environment.
货币的防伪技术主要反映在制版、雕刻、印刷等技术和印刷材料如纸张、油墨上。
The technology against counterfeit money is mainly reflected in plate making, engraving, printing, printing materials and printing ink.
货币的防伪技术主要反映在制版、雕刻、印刷等技术和印刷材料如纸张、油墨上。
The technology against counterfeit money is mainly reflected in plate making, engraving, printing, printing materials and printing ink.
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