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  2. Enigma rotor details - Wikipedia

    en.wikipedia.org/wiki/Enigma_rotor_details

    Ring setting. The ring settings, or Ringstellung, are used to change the position of the alphabet ring relative to the internal wiring. Notch and alphabet ring are fixed together. Changing the ring setting will therefore change the positions of the wiring, relative to the turnover-point and start position. The ring setting will rotate the wiring.

  3. Bezel (jewellery) - Wikipedia

    en.wikipedia.org/wiki/Bezel_(jewellery)

    Bezel settings use a type of elevated collar which wraps the rim of the diamond in a complete metal edging. This type of diamond ring setting is the most secure fastener for the stones. The bezel setting also protects the diamond better than other types of settings, such as the prong setting. A flush setting for diamond rings is a variation on ...

  4. Prong setting - Wikipedia

    en.wikipedia.org/wiki/Prong_setting

    A prong set diamond in a gold ring.. Prong setting or prong mount refers to the use of metal projections or tines, called "prongs", to secure a gemstone to a piece of jewelry.A prong setting is one component of what is known to jewelers as a head, a claw-shaped type of binding (typically three, four, or six individual prongs per head) that is welded or soldered to a jewelry item to mount (or ...

  5. Stonesetting - Wikipedia

    en.wikipedia.org/wiki/Stonesetting

    A bezel set sapphire. The earliest known technique of attaching stones to jewelry was bezel setting. A bezel is a strip of metal bent into the shape and size of the stone and then soldered to the piece of jewelry. The stone is then inserted into the bezel, and the metal edge of the bezel pressed over the edge of the stone, holding it in place.

  6. Tension ring - Wikipedia

    en.wikipedia.org/wiki/Tension_ring

    Tension ring. Tension ring. A tension ring is a type of finger ring that holds a gemstone in place by pressure rather than prongs, a bezel or other mounting. The metal setting is actually spring-loaded to exert pressure onto the gemstone, and tiny etchings or grooves in the metal create a shelf that supports the gemstone's edges.

  7. Ring of sets - Wikipedia

    en.wikipedia.org/wiki/Ring_of_sets

    A semiring (of sets) is a family of sets with the properties. If (3) holds, then if and only if. implies and. implies for some disjoint. Every ring (in the measure theory sense) is a semi-ring. On the other hand, on is a semi-ring but not a ring, since it is not closed under unions. A semialgebra [3] or elementary family [4] is a collection of ...

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