hb pencil - SERP Analysis

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https://www.reddit.com/r/coolguides/comments/sq4e1g/guide_to_pencil_hardness_us12b_2hb_32h/

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https://arteza.com/collections/number-2-pencils

https://www.quora.com/What-is-the-significance-of-the-HB-marking-on-a-pencil-Why-do-other-markings-above-or-below-it-have-a-different-meaning

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