Unverified79% confidenceDecision RuleTime unknown
判断笔芯均匀度看削尖后笔芯是否居中：高端品牌采用挤压成型工艺笔芯居中、削出锥面对称，劣质铅笔笔芯偏心导致易断且削后不对称
1
Sources
79%
Confidence
Long-term
Relevance
-
First Seen
Sources
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