European Pencil Manufacturers Typically Classify Graphite Pencils Using The Letters 'H' And 'B'. Under The Most Common Interpretation, The Letter 'B' Stands For 'Black', While The Letter 'H' Stands For What Other Word?'''

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1. European Pencil Manufacturers Typically Classify Graphite Pencils Using The Letters 'H' And 'B'. Under The Most Common Interpretation, The Letter 'B' Stands For 'Black', While The Letter 'H' Stands For What Other Word?'''