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2. Ball transfer unit - Wikipedia

   en.wikipedia.org/wiki/Ball_transfer_unit

   Ball transfer unit Cross-section through a spring-loaded ball transfer unit with a polymer seal ring and a drain hole in the bottom. A ball transfer unit is an omnidirectional load-bearing sphere mounted inside a restraining fixture. They are identical in principle to a computer trackball (pointing device). Typically the design involves a ...

3. Air caster - Wikipedia

   en.wikipedia.org/wiki/Air_caster

   An air caster is a pneumatic lifting device used to move heavy loads on flat, non-porous surfaces. Its operation is similar to a hovercraft , as it uses a thin layer of air as a way to float a very small distance off the ground.

4. Caster - Wikipedia

   en.wikipedia.org/wiki/Caster

   A swivel caster. A caster (or castor) is an undriven wheel that is designed to be attached to the bottom of a larger object (the "vehicle") to enable that object to be moved. Casters are used in numerous applications, including shopping carts, office chairs, toy wagons, hospital beds, and material handling equipment. High capacity, heavy duty ...

5. 30 Fascinating Historical Photos That Offer A New Perspective ...

   www.aol.com/history-cool-kids-91-interesting...

   The yellow Teletubby, Laa-Laa, was 6 feet 5 inches (196 cm). The green Teletubby, Dipsy, was 8 feet (244 cm).⁣ The show was filmed on an incredibly large set to create the illusion that the ...

6. Canister shot - Wikipedia

   en.wikipedia.org/wiki/Canister_shot

   Examples of old case-shot, which predates the canister British case-shot, 1914. Canister shot consists of a closed metal cylinder typically loosely filled with round lead or iron balls packed with sawdust to add more solidity and cohesion to the mass and to prevent the balls from crowding each other when the round was fired.

7. Future Assault Shell Technology helmet - Wikipedia

   en.wikipedia.org/wiki/Future_Assault_Shell...

   The FAST RF1 High Cut Helmet System released in 2021 is a rifle rated ballistic helmet at an average of 3.5 lbs (1592 grams) able to protect against rifle rounds like the 7.62×39mm and 7.62x51mm due to the 0.400" (10.16mm) shell thickness. The different color options are tan 499, ranger green, MultiCam, black, and urban gray.