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Individual
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Individual
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Priority to ES0294022ApriorityCriticalpatent/ES294022A1/es
Publication of ES294022A1publicationCriticalpatent/ES294022A1/es
Valves And Accessory Devices For Braking Systems
(AREA)
Regulating Braking Force
(AREA)
ES0294022A1963-11-291963-11-29Perfeccionamientos introducidos en la construcciën de mecanismos para el frenado de seguridad en vehiculos
ExpiredES294022A1
(es)
Pressure resistant poppet or flap valve for ventilating ducts, particularly in underground safety structures, such as bunkers, air raid shelters or the like