1. The position on a typewriter where the types impact the paper. 
   打字机打印部件击打纸的位置。
2. A printer that forms dot matrix characters by means of linear, ridged print hammers that impact paper and ribbon against a helical ridge on a rotating cylinder. 
   一种采用线性脊纹打印锤的点阵字符打印机，打印时打印锤撞击紧贴在螺旋脊纹旋转圆筒上的纸和色带。
3. insulation of impact sound 
   撞击声的隔声
4. prediction of impact point 
   落点预示
5. paper wall and paper ceiling 
   裱糊施工

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• 1. 压敏纸
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