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圆规怎么装笔芯

更新时间: 2021-03-22 16:34:55     

1、首先把如图圆圈内的原来的螺帽旋转下来,拧下螺帽后。

2、将拧下来的针替换成铅笔芯。

3、按原来的样子,重新组装好。换好铅芯的圆规。

关键词: 圆规 怎么 笔芯

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