DK8869C
(en)
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Electromagnetically affected Valve Heating and Ventilation system.
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CH37712A
(en)
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Electromagnetically operated valve for heating and ventilation systems
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CH38617A
(en)
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Valve
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CH34728A
(en)
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Electromagnetically operated valve for heating and ventilation systems
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CH37507A
(en)
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Electromagnetic valve
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CA107140A
(en)
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Heating and ventilating system
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DK10848C
(en)
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Air valve for heating systems.
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GB190726743A
(en)
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Improvements in Ventilating Systems.
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AT27667B
(en)
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Valve.
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DK8410C
(en)
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Valve control for steam engines and the like.
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AT36424B
(en)
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Air humidification system.
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AT39100B
(en)
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Valve.
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FI3115A
(en)
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Ventilation valve
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AT26340B
(en)
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Fan.
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DK8392C
(en)
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Heating stove with Air heating pipe in the boiler room.
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DK9900C
(en)
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Humidifier.
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FR375676A
(en)
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Postcard, illustrated or not with closed correspondence
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DK8655C
(en)
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Hot water heating system.
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CH39765A
(en)
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Valve
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CH41475A
(en)
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Valve
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DK8929C
(en)
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Air heating box, intended for use in ovens and other heaters.
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DK8622C
(en)
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Heater or Cooler.
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AT23701B
(en)
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Valve device for evacuation of steam and ventilation of baking and drying rooms.
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CH40677A
(en)
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Improved valve
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DK8848C
(en)
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Water pipe boiler for Central heating systems and the like.
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