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2. Garage door - Wikipedia

   en.wikipedia.org/wiki/Garage_door

   Extension spring systems should always be restrained by a safety cable that runs through the middle of the spring, tying off to a solid point at the rear and front of the horizontal door track. The safety cable prevents hazards to bystanders when a spring, pulley, or cable breaks under tension and makes the system relatively safe.

3. Torsion spring - Wikipedia

   en.wikipedia.org/wiki/Torsion_spring

   Garage Door Sectional Torsion Spring A mousetrap powered by a helical torsion spring Video of a model torsion pendulum oscillating. A torsion spring is a spring that works by twisting its end along its axis; that is, a flexible elastic object that stores mechanical energy when it is twisted.

4. List of How It's Made episodes - Wikipedia

   en.wikipedia.org/wiki/List_of_How_It's_Made_episodes

   Compression & extension springs: Micro Drill bits: Skiffs: Painted glass backsplashes 32-10 413 Fencing masks Books: Ocean drone transformers: 3D puzzles: March 17, 2019 32-11 414 Tin whistles: Horn products Formula F race cars 32-12 415 Motorcycle goggles: Hand-built jukeboxes: Vacuum excavators: Pewter shaving sets March 24, 2019 32-13 416 ...

5. 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!

6. Spring (device) - Wikipedia

   en.wikipedia.org/wiki/Spring_(device)

   A flat spring fixed only at one end like a cantilever, while the free-hanging end takes the load. Coil spring Also known as a helical spring. A spring (made by winding a wire around a cylinder) is of two types: Tension or extension springs are designed to become longer under load. Their turns (loops) are normally touching in the unloaded ...

7. Extension cord - Wikipedia

   en.wikipedia.org/wiki/Extension_cord

   Yellow NEMA 5-15 extension cord NEMA-1 extension cord, common in the United States Extension cord reel (Germany). An extension cord (US), extension cable, power extender, drop cord, or extension lead (UK) is a length of flexible electrical power cable (flex) with a plug on one end and one or more sockets on the other end (usually of the same type as the plug).