DIFF Subgroup
F28G 1/125 Full Title
Non-rotary, e.g. reciprocated, appliances (F28G3/00 takes precedence) > Fluid-propelled scrapers, bullets, or like solid bodies
F28G 1/125 Non-rotary, e.g. reciprocated, appliances (F28G3/00 takes precedence) > Fluid-propelled scrapers, bullets, or like solid bodies