In letterpress, the prepared paper used on the impression cylinder or platen to increase pressure on solid areas of relief plates.
活版印刷，放于压力圆筒或压板外边的特别准备纸张。以增加印版实地部分的压力。
In letterpress, the prepared paper used on the impression cylinder or platen to increase pressure on solid areas of relief plates.
活版印刷，放于压力圆筒或压板外边的特别准备纸张。以增加印版实地部分的压力。
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