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Publication of BE442790ApublicationCriticalpatent/BE442790A/xx
H01H35/00—Switches operated by change of a physical condition
H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
H01H35/40—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by devices allowing continual flow of fluid, e.g. vane