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safety valve noun

  /ˈseɪfti ˌvælv/ , /ˈseɪftɪ ˌvælv/
  • A valve set to open at a pressure below that at which a container holding a gas, vapour, etc. (such as a boiler or pressure cooker), would burst, thus reducing the pressure; a relief valve.
 válvula de seguridad, válvula de alivio de presión, válvula de alivio, válvula de escape
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