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3: The first and second curvatures shown in a bent pencil eraser (a).... | Download Scientific Diagram
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E-पाठन by Varitra - Did you know, the first erasers were pieces of bread? There was no better substance in hand for removing pencil marks until rubber was available in the Old
![On this day in history, March 30, 1858, American visionary Hymen Lipman patents pencil with eraser | Fox News On this day in history, March 30, 1858, American visionary Hymen Lipman patents pencil with eraser | Fox News](https://a57.foxnews.com/static.foxnews.com/foxnews.com/content/uploads/2023/03/1200/675/818A4C12-ED7B-407A-945F-3F52F704A3CD.jpg?ve=1&tl=1)
On this day in history, March 30, 1858, American visionary Hymen Lipman patents pencil with eraser | Fox News
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