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2. Jewellery cleaning - Wikipedia

   en.wikipedia.org/wiki/Jewellery_cleaning

   Ultrasonic cleaner showing the removable basket in place, and a closeup of the light and timer Ultrasonic cleaners are useful for jewelry cleaning and removing tarnish. They use ultrasound waves and chemicals combined to create bubbles that "cling" to the foreign particles such as dirt, oil, and unknown substances.

3. The popular Kunphy ultrasonic jewelry cleaner is on sale at ...

   www.aol.com/lifestyle/kunphy-ultrasonic-jewelry...

   The Kunphy Ultrasonic Jewelry Cleaner works on glasses, razors and makeup brushes too — and it's on sale right now for just $36! kunphy Kunphy Ultrasonic Jewelry Cleaner

4. Krugerrand - Wikipedia

   en.wikipedia.org/wiki/Krugerrand

   It was minted in a copper-gold alloy more durable than pure gold. By 1980, the Krugerrand accounted for 90% of the global gold coin market. [8] That year, South Africa introduced three smaller coins containing 1 ⁄ 2, 1 ⁄ 4, and 1 ⁄ 10 troy ounce (15.6, 7.8, and 3.1 g) of gold. [9]

5. Ultrasonic cleaning - Wikipedia

   en.wikipedia.org/wiki/Ultrasonic_cleaning

   Ultrasonic cleaning is a process that uses ultrasound (usually from 20 to 40 kHz) to agitate a fluid, with a cleaning effect. Ultrasonic cleaners come in a variety of sizes, from small desktop units with an internal volume of less than 0.5 litres (0.13 US gal), to large industrial units with volumes approaching 1,000 litres (260 US gal).

6. Coins of the South African rand - Wikipedia

   en.wikipedia.org/wiki/Coins_of_the_South_African...

   The gold Krugerrand coin is produced in 1/10 oz, 1/4 oz, 1/2 oz and 1 oz denominations. The silver Krugerrand was first introduced in 2017 to commemorate 50 years of the Krugerrand. The 2017 silver Krugerrand has a commemorative inscription on the reverse. Since 2018, the silver Krugerrand has been struck, but these do not have a commemorative ...

7. US budget airlines are struggling. Will pursuing premium ...

   www.aol.com/us-budget-airlines-struggling...

   Delta and United have become the most profitable U.S. airlines by targeting premium customers while also winning back a significant share of travelers on a tight budget. Other discount airlines ...