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  2. Ring size - Wikipedia

    en.wikipedia.org/wiki/Ring_size

    Ring sizes can be measured physically by a paper, plastic, or metal ring sizer (as a gauge) or by measuring the inner diameter of a ring that already fits. Ring sticks are tools used to measure the inner size of a ring, and are typically made from plastic, delrin, wood, aluminium, or of multiple materials. Digital ring sticks can be used for ...

  3. Lifebuoy - Wikipedia

    en.wikipedia.org/wiki/Lifebuoy

    The lifebuoy is usually a ring- or horseshoe-shaped personal flotation device with a connecting line allowing the casualty to be pulled to the rescuer in a boat. They are carried by ships and boats and located beside bodies of water and swimming pools. To prevent vandalism, they are protected by fines (up to £5,000 in the United Kingdom) or ...

  4. Rings of Jupiter - Wikipedia

    en.wikipedia.org/wiki/Rings_of_Jupiter

    The rings of Jupiter are a system of faint planetary rings. The Jovian rings were the third ring system to be discovered in the Solar System, after those of Saturn and Uranus. The main ring was discovered in 1979 by the Voyager 1 space probe [1] and the system was more thoroughly investigated in the 1990s by the Galileo orbiter. [2]

  5. Oura Health - Wikipedia

    en.wikipedia.org/wiki/Oura_Health

    Oura Health Ltd (natively Oura Health Oy) [1][2] is a Finnish health technology company, known for the Oura Ring (stylized Ōura), a smart ring used to track sleep and physical activity. The company was founded in 2013 by Petteri Lahtela, Kari Kivelä, and Markku Koskela. Harpreet Singh Rai was the CEO from 2018 until 2021, when he was replaced ...

  6. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  7. Ring-closing metathesis - Wikipedia

    en.wikipedia.org/wiki/Ring-closing_metathesis

    Ring-closing metathesis (RCM) is a widely used variation of olefin metathesis in organic chemistry for the synthesis of various unsaturated rings via the intramolecular metathesis of two terminal alkenes, which forms the cycloalkene as the E- or Z- isomers and volatile ethylene. [1][2] The most commonly synthesized ring sizes are between 5-7 ...