HRD

释义与例句

n.
  1. 1.

    Abbreviation of hardness on Rockwell scale D.

name
  1. 1.

    Initialism of Huanghe River Delta (= Yellow River Delta): a geographic region of China, on the Yellow River/Huanghe, at its delta regions by the Shandong Peninsula, on the Bohai Sea and Yellow Sea, marginal seas of the Pacific Ocean.