老师们把粉笔当成了一个书写器具了。
本发明提供一种，以本身功能就可在同一个书写笔端获得两种及两种以上书写效果的书写器具，并且还可延长其两端用笔书写时间及使用寿命的复合笔。
The present invention provides a composite pen which can yield two or more kinds of writing effects at its tip and can prolong the writing time and working life of both tips.
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