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2. Tumble finishing - Wikipedia

   en.wikipedia.org/wiki/Tumble_finishing

   A well-chosen speed for stone polishing causes the rocks within the barrel to slide past each other, with the abrasive grit between them. The result of this depends on the coarseness of the abrasive, and the duration of the tumble. Typically, a full tumble polish from rough rock to polish takes 3–5 weeks, and is done in a minimum of 3 steps.

3. Polishing (metalworking) - Wikipedia

   en.wikipedia.org/wiki/Polishing_(metalworking)

   While used less extensively than traditional mechanical polishing, electropolishing is an alternative form of polishing that uses the principles of electrochemistry to remove microscopic layers of metal from a base surface. [3] This method of polishing can be fine-tuned to give a wide range of finishes, from matte to mirror-bright.

4. Electropolishing - Wikipedia

   en.wikipedia.org/wiki/Electropolishing

   Electropolishing, also known as electrochemical polishing, anodic polishing, or electrolytic polishing (especially in the metallography field), is an electrochemical process that removes material from a metallic workpiece, reducing the surface roughness by levelling micro-peaks and valleys, improving the surface finish.

5. PMP Floating Bridge - Wikipedia

   en.wikipedia.org/wiki/PMP_Floating_Bridge

   The designation PP stands for "Pontoon Park" and can be assembled into a group of rafts or a bridge spanning up to 879 ft (268 m) with a capacity from 90 to 360 tons. The system employs 15 ton Ural-53236 trucks and BMK-225 bridging boats. [5] The latest variant of the PP-91 system is the PP-2005 which uses KamAZ 63501 trucks and BMK-MT ...

6. Tooth polishing - Wikipedia

   en.wikipedia.org/wiki/Tooth_polishing

   The purpose of polishing is to remove extrinsic stains, remove dental plaque accumulation, increase aesthetics and to reduce corrosion of metallic restorations. [1] [2] Tooth polishing has little therapeutic value and is usually done as a cosmetic procedure after debridement and before fluoride application. [3]

7. Portal:Current events/August 2024 - Wikipedia

   en.wikipedia.org/wiki/Portal:Current_events/...

   Ukraine announces that it will create a strategic buffer zone on the Russia–Ukraine border that is "designed to protect our border communities from daily enemy attacks". (Reuters) Russia evacuates thousands more civilians from borderlands in the Kursk Oblast amid deeper progression of the Armed Forces of Ukraine into the region.