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  2. ISO 7010 - Wikipedia

    en.wikipedia.org/wiki/ISO_7010

    ISO 7010 states on all symbols with a first aid cross, that it "may be replaced with another element appropriate to cultural requirements". In countries with a Muslim -majority population, an appropriate symbol is the crescent .

  3. Wiring diagram - Wikipedia

    en.wikipedia.org/wiki/Wiring_diagram

    For example, a surface ceiling light is shown by one symbol, a recessed ceiling light has a different symbol, and a surface fluorescent light has another symbol. Each type of switch has a different symbol and so do the various outlets. There are symbols that show the location of smoke detectors, the doorbell chime, and thermostat.

  4. Exit sign - Wikipedia

    en.wikipedia.org/wiki/Exit_sign

    A flaw in these designs was that in a fire the power to the light often failed. In addition, the fixtures, despite their brightness, could be hard to see through smoke. The biggest problem [citation needed] was that the exit sign was hardly distinguishable from an ordinary safety lighting fixture commonly installed above doors in the past. The ...

  5. Engineering drawing abbreviations and symbols - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing...

    The issuance of a drawing from the engineering/design activity to the production activity. In other words, the event when a draft becomes a completed, official document. A stamp on the drawing saying "ISSUED" documents that RTP has occurred. RTV: room-temperature vulcanizing; return to vendor: 1. RTV sealants, a way to seal joints. 2.

  6. File:Smoking AIGA symbol.svg - Wikipedia

    en.wikipedia.org/wiki/File:Smoking_AIGA_symbol.svg

    This image is from the AIGA symbol signs collection which was produced through a collaboration between AIGA and the U.S. Department of Transportation (DOT) in 1974 and 1979. All images in the collection are public domain.

  7. Fire alarm notification appliance - Wikipedia

    en.wikipedia.org/wiki/Fire_alarm_notification...

    A fire alarm notification appliance is an active fire protection component of a fire alarm system. A notification appliance may use audible, visible, or other stimuli to alert the occupants of a fire or other emergency condition requiring action. Audible appliances have been in use longer than any other method of notification.

  8. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Smoke detector - Wikipedia

    en.wikipedia.org/wiki/Smoke_detector

    Residential smoke alarms are usually powered with a 9-volt battery, or by mains electricity. Some smoke alarms use a combination of the 2; usually using the 9V battery as an extra power source in the event of an outage. Commercial smoke detectors issue a signal to a fire alarm control panel as part of a fire alarm system. Usually, an individual ...