G06DDIGITAL FLUID-PRESSURE COMPUTING DEVICESThis subclass includes all devices in which at least one computing function is performed by hydraulic or pneumatic meansIn this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme. G06D1/00 G06D1/00Details, e.g. functional units individual logic elements F15C; valves F16K G06D1/02having at least one moving part, e.g. spool valve G06D1/04AddingSubtracting G06D1/06MultiplyingDividing G06D1/08having no moving parts G06D1/10AddingSubtracting G06D1/12MultiplyingDividing G06D3/00Computing devices characterised by the interrelationship of the functional units and having at least one moving part G06D5/00Computing devices characterised by the interrelationship of the functional units and having no moving parts G06D7/00Computing devices characterised by the combination of hydraulic or pneumatic functional elements with at least one other type of functional element