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2. Tell-tale (bridges) - Wikipedia

   en.wikipedia.org/wiki/Tell-tale_(bridges)

   A tell-tale, also known as a bridge warning, is a series of ropes suspended over railway tracks to give warning to the engineer, and more importantly the brakeman who may be scampering across the tops of the cars, that the train is approaching a low-clearance obstacle, such as a tunnel or a bridge. [1] [2] In the US, a standard tell-tale design ...

3. Garage door - Wikipedia

   en.wikipedia.org/wiki/Garage_door

   A garage door is a large door to allow egress for a garage that opens either manually or by an electric motor (a garage door opener ). Garage doors are frequently large enough to accommodate automobiles and other vehicles. The operating mechanism is usually spring-loaded or counterbalanced to offset the door's weight and reduce the human or ...

4. Rolling code - Wikipedia

   en.wikipedia.org/wiki/Rolling_code

   Rolling code. A rolling code (or sometimes called a hopping code) is used in keyless entry systems to prevent a simple form of replay attack, where an eavesdropper records the transmission and replays it at a later time to cause the receiver to 'unlock'. Such systems are typical in garage door openers and keyless car entry systems.

5. Dr. Sanjay Gupta On Call: What are your questions about zero ...

   www.aol.com/news/dr-sanjay-gupta-call-questions...

   Experts generally agree that Americans consume too much added sugar every day, so many of us turn to zero-calorie sweeteners to satisfy a sweet tooth. The US Food and Drug Administration has ...

6. When do Hummingbirds leave? As migration starts, how to spot ...

   www.aol.com/hummingbirds-leave-migrations-starts...

   Hummingbird migration season gets underway in August, sending the birds flying to warm destinations thousands of miles away to last out the cold winter months and bringing bird-watchers new ...

7. Vehicle recovery - Wikipedia

   en.wikipedia.org/wiki/Vehicle_recovery

   Vehicle recovery in Guerrero, Mexico. Vehicle recovery is the recovery of any vehicle to another place, generally speaking with a commercial vehicle known as a recovery vehicle, tow truck or spectacle lift. Recovery can take the form of general recovery, normally of broken down vehicles, or a Statutory Recovery at the request of the police ...