5H

词形变化

5Hs 复数 5Hs

释义与例句

n.
  1. 1.

    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.

    不可数 英国
  2. 2.

    A pencil of the grade 5H.

    不可数