对HP绘图仪P_3笔的改进

The Improvement of the Border Pen P_3of HP Graphics Plotter

ＨＥＷＬＥＴＴ—ＰＡＣＫＡＲＤ绘图仪的Ｐ３绘图笔，笔芯材质软，易磨损变粗、变干，尤其是对密集型峰图谱的描绘不尽人意、改进后的笔经实践证明不仅耐用性好，绘图效果也很好，使密集型峰清晰可辨。

By replacing the worn out cole of Pea P3 with a ball pea core and the original spring on the pen frame with a stronger one, the performance of the Pen P3 in HP graphic Plotter can be recovered or even better than the Original.