Subclass Subgroup Patent
F28D 15/046 09810483
F28F 1/10 09810484
  3/08 09810485
  5/00 09810486
  9/0243 09810487
  13/08 09810488
  17/005 09810489
  27/00 09810490
  27/02 09810491
F28G 9/00 09810492