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2. Tripod head - Wikipedia

   en.wikipedia.org/wiki/Tripod_head

   Swiss camera equipment maker Arca-Swiss Phototechnik AG independently developed a quick-release mounting system for their tripod heads. The system is based on 38 mm wide mounting plates with a 45° dovetail rail on the sides, [ 1 ] which is clamped into place on the tripod head receiver with a screw -fastened grabber plate.

3. Full Spectrum Battle Equipment Amphibious Assault Vest

   en.wikipedia.org/wiki/Full_Spectrum_Battle...

   This vest was unique in its quick release system, allowing the Marine to ditch the entire vest very quickly in case of emergency. This quick release feature, also used with newer modular plate carriers such as the Paraclete Releasable Assault Vest, was developed in response to a 9 December 1999 CH-46E Sea Knight helicopter crash over the Pacific.

4. NATO Accessory Rail - Wikipedia

   en.wikipedia.org/wiki/NATO_Accessory_Rail

   NATO Accessory Rail (STANAG 4694) The NATO Accessory Rail (NAR), defined by NATO Standardization Agreement (STANAG) 4694, is a rail interface system standard for mounting accessory equipment such as telescopic sights, tactical lights, laser aiming modules, night vision devices, reflex sights, foregrips, bipods and bayonets to small arms such as rifles and pistols.

5. Researchers document huge drop in African elephants in a half ...

   www.aol.com/news/researchers-document-huge-drop...

   African elephants are Earth's largest land animals, remarkable mammals that are very intelligent and highly social. Fresh evidence of this comes in a study that documents alarming population ...

6. Diving weighting system - Wikipedia

   en.wikipedia.org/wiki/Diving_weighting_system

   Weight belts are the most common weighting system currently in use for recreational diving. [17] Weight belts are often made of tough nylon webbing, but other materials such as rubber can be used. Weight belts for scuba and breathhold diving are generally fitted with a quick release buckle to allow the dumping of weight rapidly in an emergency. [7]

7. Glasses are 50% off at GlassesUSA during Black Friday: Frames ...

   www.aol.com/lifestyle/glasses-usa-black-friday...

   Here's a quick look at what real pricing will look like. I just ordered this pair from the sale: They were marketed as $24.50, but since my prescription has a prism, it added $30. I also opted for ...