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2. Borromean rings - Wikipedia

   en.wikipedia.org/wiki/Borromean_rings

   A trivial link with three components has colorings, obtained from its standard diagram by choosing a color independently for each component and discarding the colorings that only use one color. For standard diagram of the Borromean rings, on the other hand, the same pairs of arcs meet at two undercrossings, forcing the arcs that cross over them ...

3. Cufflink - Wikipedia

   en.wikipedia.org/wiki/Cufflink

   Cufflink designs vary widely, with the most traditional the "double-panel", consisting of a short post or (more often) chain connecting two circular disc-shaped parts, both decorated. Whale-back and toggle-back cufflinks have a flat decorated face for one side, while the other side shows only the swivel-bar and its post.

4. Aiguillette - Wikipedia

   en.wikipedia.org/wiki/Aiguillette

   The cord colors are gold for the Army and silver for the Air Force, gold and blue for the Coast Guard, Navy and NOAA Commissioned Officer Corps, with one braid "per star" of the Flag Officer (one for RDML, two for RADM, three for VADM and four for ADM), and gold and red for the Marines, with the number of braids corresponding to the rank of the ...

5. Railway coupling - Wikipedia

   en.wikipedia.org/wiki/Railway_coupling

   The basic type of coupling on railways following the British tradition is the buffer and chain coupling. A large chain of three links connects hooks on the adjoining wagons. These couplings followed earlier tramway practice but were made more regular. Buffers on the frame of the wagon absorbed impact loads, as the train overran a slowing ...

6. Chain - Wikipedia

   en.wikipedia.org/wiki/Chain

   A common metal short-link chain Roller chains. A chain is a serial assembly of connected pieces, called links, typically made of metal, with an overall character similar to that of a rope in that it is flexible and curved in compression but linear, rigid, and load-bearing in tension.

7. US manufacturing contraction slows in November, outlook uncertain

   www.aol.com/news/us-manufacturing-improves...

   The Atlanta Fed upgraded its gross domestic product growth estimate for the fourth quarter to a 3.2% annualized rate from a 2.7% pace earlier. The economy grew at a 2.8% rate in the third quarter.