IPC Definitions - January 01, 2012
F22B - Definition
Attention is drawn to the following places, which may be of interest for search:
Chemical or physical apparatus for generating gases | B01J |
Generating combustion products of high pressure or high velocity | F23R |
Water heaters not for steam generation | F24H, F28 |
Cleaning of internal or external surfaces of heat-transfer conduits, e.g. water tubes of boilers | F28G |