毫米汞柱 [－－－－]

Jyutping hou4 mai5 hung6 cyu5
Pinyin háo mǐ gǒng zhù

Definitions (CC-CEDICT)
  1. millimeter of mercury
  2. mmHg (unit of pressure)
Definitions (Wiktionary)
  1. noun
    millimeter of mercury