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2. SKF - Wikipedia

   en.wikipedia.org/wiki/SKF

   AB SKF (Swedish: Svenska Kullagerfabriken, 'Swedish Ball Bearing Factory') is a Swedish bearing and seal manufacturing company founded in Gothenburg, Sweden, in 1907.The company manufactures and supplies bearings, seals, lubrication and lubrication systems, maintenance products, mechatronics products, power transmission products, condition monitoring systems and related services globally.

3. Green's Christmas seal catalog - Wikipedia

   en.wikipedia.org/wiki/Green's_Christmas_seal_catalog

   Green's Catalog of the Tuberculosis Seals, US National Christmas Seals is a seminal philatelic catalog written by Dick Green, a pioneer member of The Christmas Seal & Charity Stamp Society. Green began his work in the 1920s and portions first appeared as a series in The Western Stamp Collector , a stamp collecting weekly.

4. Christmas seals - Wikipedia

   en.wikipedia.org/wiki/Christmas_seals

   The catalogue value of a Christmas seal, as with postage stamps and coins, usually increases over time. For example, in 1935 the Scott Catalogue [f] value for a Christmas seal issued in 1915 was 25-cents. [41] In 1983 its catalogue value increased to $4. By 2014 the Scott Catalogue Value was fixed at $9.00. [42]

5. End-face mechanical seal - Wikipedia

   en.wikipedia.org/wiki/End-face_mechanical_seal

   In mechanical engineering, an end-face mechanical seal (often shortened to mechanical seal) is a type of seal used in rotating equipment, such as pumps, mixers, blowers, and compressors. When a pump operates, the liquid could leak out of the pump between the rotating shaft and the stationary pump casing. Since the shaft rotates, preventing this ...

6. NFL playoff scenarios: Which teams can clinch in Week 15? - AOL

   www.aol.com/nfl-playoff-scenarios-teams-clinch...

   With four weeks left in the NFL regular season, only four teams have clinched playoff spots. But several more could join them in Week 15.

7. Rolling-element bearing - Wikipedia

   en.wikipedia.org/wiki/Rolling-element_bearing

   Although seals are appealing, they increase friction, and in a permanently sealed bearing the lubricant may become contaminated by hard particles, such as steel chips from the race or bearing, sand, or grit that gets past the seal. Contamination in the lubricant is abrasive and greatly reduces the operating life of the bearing assembly. Another ...