5H
(British) A grade of pencil with lead that makes lighter marks than a pencil grade 4H but darker marks than a pencil of grade 6H; a pencil with very hard lead. / A pencil of the grade 5H.
plural of Moustafa
On the scale of a field.
(zoology) A kind of regular or irregular branching spicule in certain sponges.
建築のスケッチでは、非常に薄くてにじまない精密な下書き線を引くために、4Hより硬く6Hより柔らかい硬さの鉛筆を使った。
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