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  2. Ring (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Ring_(chemistry)

    A ring system that is a simple cycle is called a monocycle or simple ring, and one that is not a simple cycle is called a polycycle or polycyclic ring system. A simple ring contains the same number of sigma bonds as atoms, and a polycyclic ring system contains more sigma bonds than atoms. A molecule containing one or more rings is called a ...

  3. Orbital welding - Wikipedia

    en.wikipedia.org/wiki/Orbital_welding

    The main components of every orbital welding system are the power supply with integrated computer control, the welding head and, where required, a wire feed mechanism. Welding of certain sizes and material types will also require the use of a water/coolant system. There are a large number of factors that can have an influence on the welding result.

  4. Ring system - Wikipedia

    en.wikipedia.org/wiki/Ring_system

    Artist's depiction of Haumea's ring system. A ring around Haumea, a dwarf planet and resonant Kuiper belt member, was revealed by a stellar occultation observed on 21 January 2017. This makes it the first trans-Neptunian object found to have a ring system. [32] [33] The ring has a radius of about 2,287 km, a width of ≈ 70 km and an opacity of ...

  5. Diffusion bonding - Wikipedia

    en.wikipedia.org/wiki/Diffusion_bonding

    Diffusion bonding or diffusion welding is a solid-state welding technique used in metalworking, capable of joining similar and dissimilar metals. It operates on the principle of solid-state diffusion, wherein the atoms of two solid, metallic surfaces intersperse themselves over time.

  6. D-ring - Wikipedia

    en.wikipedia.org/wiki/D-ring

    A D-ring used to secure cargo in a utility trailer (A) D-ring (shown in isometric view) (B) Weld-on pivot link; note the incorrect fillet weld call-out (bottom-right). The correct method of securing a weld-on pivot link is a [t weld] which consists of a perpendicular vee butt joint secured to the billet using a butt weld or fusion weld.

  7. Symbols and conventions used in welding documentation

    en.wikipedia.org/wiki/Symbols_and_conventions...

    The symbolic representation of a V weld of chamfered plates in a technical drawing. The symbols and conventions used in welding documentation are specified in national and international standards such as ISO 2553 Welded, brazed and soldered joints -- Symbolic representation on drawings and ISO 4063 Welding and allied processes -- Nomenclature of processes and reference numbers.

  8. Earth ring theory may shed light on an unexplained ancient ...

    www.aol.com/earth-may-had-saturn-ring-115417013.html

    A large asteroid broken apart by Earth's gravitational pull could have formed a Saturn-like ring around the planet about 466 million years ago, a new study found.

  9. Rotary friction welding - Wikipedia

    en.wikipedia.org/wiki/Rotary_friction_welding

    The results are for example not the same in welds made for the European Space Agency with a high turnover ω = 14000 rpm [61] or another example from Warsaw technical university 12000 rpm [41] and no typical very short friction time only 60 milliseconds [42] instead of using an standard parameters, in addition, in this case, ultra fine grain ...