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2. Air door - Wikipedia

   en.wikipedia.org/wiki/Air_door

   A typical commercial air curtain enclosure. In North America, the more commonly-used term for an air door is "air curtain". The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) defines an air door as follows: "In its simplest application, an air curtain is a continuous broad stream of air circulated across a doorway of a conditioned space.

3. Airbag - Wikipedia

   en.wikipedia.org/wiki/Airbag

   The Cockpit Air Bag System (CABS) [157] consists of forward and lateral airbags, and an inflatable tubular structure (on the OH-58D only) with an Electronic Crash Sensor Unit (ECSU). The CABS system was developed by the United States Army Aviation Applied Technology Directorate, through a contract with Simula Safety Systems (now BAE Systems). [158]

4. Besam (Assa Abloy) - Wikipedia

   en.wikipedia.org/wiki/Besam_(Assa_Abloy)

   Besam was an international supplier and manufacturer of automatic entrance equipment for commercial, health care and residential buildings owned by Assa Abloy. [1] The product portfolio included automatic doors, automatic swing doors, sliding doors and revolving doors, as well as air curtains and dedicated service and maintenance.

5. Output signal switching device - Wikipedia

   en.wikipedia.org/wiki/Output_Signal_Switching_Device

   The device usually acts as the interface of a sensor (such as a light curtain), designed to signal a safety-related event, typically when the light curtain beam's being "broken". OSSD signals are the outputs from the protective device (light curtain or scanner) to a safety relay. OSSD outputs are typically semiconductor or transistor outputs ...

6. Air curtain - Wikipedia

   en.wikipedia.org/wiki/Air_curtain

   Air curtain may refer to: Air door, a fan-powered device used for separating two spaces from each other; Pneumatic barrier for containing oil spills; See also.

7. Swing-door operator - Wikipedia

   en.wikipedia.org/wiki/Swing-door_operator

   Electro-pneumatic—the motor drives an air compressor and may be located away from the door. The air pressure is used to drive the operator above the door. This type is not common, and noise can be a factor if compressor is located close to a door. Typically, the compressor can be located up to 200 feet away ensuring that noise is not a factor.