Description
Class F03C : POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
Subclass 1/06: Reciprocating-piston liquid engines with multiple cylinders, characterised by the number or arrangement of cylinders (with movable cylinders F03C 1/22; of flexible-wall type F03C 7/00) with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis