HH

• abbr.
  • halogenated hydrocarbon 【化学】齿化烃
  • His(或Her)Highness 殿下
  • His Holiness 陛下,圣座

H.H.

• abbr.
  • half hard
  • handhole
  • heavy hydrogen

H.h

• abbr.half hard

hH

• abbr.heavy hydrogen

hh.

• abbr.hands