Unverified85% confidenceTradeoffTime unknown
全针管笔尖(如三菱UM-100针管)出墨精准适合绘图制图,但书写手感偏涩、尖端易磨损弯曲;子弹头笔尖更耐用顺滑,日常书写优先选子弹头
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85%
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Long-term
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