F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F02 COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
F02F CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
F02F7/00 Casings, e.g. crankcases; or frames