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  2. 3M contamination of Minnesota groundwater - Wikipedia

    en.wikipedia.org/wiki/3M_Contamination_of...

    Since then, 3M has continued to use PFAs in a variety of products, with Scotchgard being the most well known and commercially lucrative. [4] Until the early 2000s, waste from the production of PFAs was dumped at four sites in Minnesota, the Washington County Landfill, the 3M Cottage Grove Chemolite Site, the 3M Woodbury site, and the 3M Oakdale ...

  3. Quench polish quench - Wikipedia

    en.wikipedia.org/wiki/Quench_polish_quench

    Quench polish quench (QPQ) is a specialized type of nitrocarburizing case hardening that increases corrosion resistance. It is sometimes known by the brand name of Tufftride, Tenifer or Melonite. [ 1 ]

  4. Polishing (metalworking) - Wikipedia

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

    A no. 8 ("mirror") finish requires polishing and buffing compounds, and polishing wheels attached to high speed polishing machines or electric drills. Lubricants like wax and kerosene [ 4 ] may be used as lubricating and cooling media during these operations, although some polishing materials are specifically designed to be used "dry."

  5. Chemical-mechanical polishing - Wikipedia

    en.wikipedia.org/wiki/Chemical-mechanical_polishing

    Chemical mechanical polishing (CMP) (also called chemical mechanical planarization) is a process of smoothing surfaces with the combination of chemical and mechanical forces. It can be thought of as a hybrid of chemical etching and free abrasive polishing. [ 1 ]

  6. Blanco (compound) - Wikipedia

    en.wikipedia.org/wiki/Blanco_(compound)

    Blanco was initially developed in the 1880s by the family firm of John Needham Pickering, a Volunteer Force member who believed that the firm (then engaged in producing polishing compounds and rouges for the cutlery industry) could come up with an alternative to the traditional white pipe clay that was being used to whiten Slade Wallace equipment at the time.

  7. Teen may be tried as adult for stabbing 13-year-old ...

    www.aol.com/teen-arrested-stabbing-13-old...

    Savannah Copeland, a 13-year-old cheerleader at Powell United Methodist Church, was found dead by her father on a hiking trail near their family home in Knox County, Tenn, on Oct. 22,

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