Unverified88% confidenceDecision RuleTime unknown
素描铅笔按硬度选：H系列(9H-H)硬且淡用于精细起稿，B系列(B-9B)软且深用于铺调子，入门套装选2H/HB/2B/4B/6B五支足够覆盖90%需求，无需买12支全套
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88%
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Long-term
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