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一种有齿的机械装置，可自动使通过计算机打印机的打孔的连页形纸张前进。
A toothed mechanism that automatically advances perforated continuous-form paper through a computer printer.
youdao
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一种有齿的机械装置，可自动使通过计算机打印机的打孔的连页形纸张前进。
A toothed mechanism that automatically advances perforated continuous-form paper through a computer printer.
youdao