鉛芯筆 鉛芯 的英文是什麼?

What size and grade of pencil lead do you need?
What kind of pencil leads are you using for sketching?

size (diameter of lead) : 2.00 mm (0.079 in), 1.40 mm (0.055 in), 1.00 mm (0.039 in), 0.70 mm (0.028 in), 0.50 mm (0.020 in), 0.35 mm (0.014 in), 0.25 mm (0.0098 in), 0.18 mm (0.0071 in), and 0.13 mm (0.0051 in)

grading (hardness) : 9H 8H 7H 6H 5H 4H 3H 2H H F HB B 2B 3B 4B 5B 6B 7B 8B 9B

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鉛筆==pencil; 鉛筆心==lead-pencil. Yip