More topics under "F15 - Fluid-pressure actuators; Hydraulics or pneumatics in general" (93,156) |
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F15B - Systems acting by means of fluids in general; Fluid-pressure actuators, e.g. servomotors; Details of fluid-pressure systems, not otherwise provided for (83,628) |
F15C - Fluid-circuit elements predominantly used for computing or control purposes (4,399) |
F15D - Fluid dynamics, i.e. methods or means for influencing the flow of gases or liquids (5,129) |