Unverified72% confidenceFactTime unknown
'防断芯'工艺(如三菱纳米微粒、蜻蜓陶瓷芯)主要作用是笔芯内部结构强化抗跌落，对使用中书写压力过大导致的断芯改善有限，重压书写者更应调整握笔
1
Sources
72%
Confidence
Long-term
Relevance
-
First Seen
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