2227| 4
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[求助] 请教各位高人: 胶印四色油墨中的黑墨,在制造过程中所选用的炭黑,存在黑度和... |
20普通分
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BYK,德谦,科盈水性助剂 炭黑
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新年新开始! <img src="static/image/smiley/comcom/4.gif" class="vm">
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