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2. Tap and die - Wikipedia

   en.wikipedia.org/wiki/Tap_and_die

   Die nut s, also known as rethreading dies, are dies made for cleaning up damaged threads, [9] have no split for resizing and are made from a hexagonal bar so that a wrench may be used to turn them. The process of repairing damaged threads is referred to as "chasing." Rethreading dies cannot be used to cut new threads as they lack chip forming ...

3. Core plug - Wikipedia

   en.wikipedia.org/wiki/Core_plug

   The Welch plug is a type of core plug that is made from a thin disc of metal. The Welch plug is dome-shaped and inserted into the casting hole with the convex side facing outwards. [ 6 ] When installed by striking the Welch plug with a hammer, the dome collapses slightly, expanding it laterally to seal the hole.

4. Automotive oil recycling - Wikipedia

   en.wikipedia.org/wiki/Automotive_oil_recycling

   Automotive oil recycling involves the recycling of used oils and the creation of new products from the recycled oils, and includes the recycling of motor oil and hydraulic oil. Oil recycling also benefits the environment: [ 1 ] increased opportunities for consumers to recycle oil lessens the likelihood of used oil being dumped on lands and in ...

5. Replenishment oiler - Wikipedia

   en.wikipedia.org/wiki/Replenishment_oiler

   The replenishment oiler HMAS Sirius (right) providing fuel to the amphibious warfare ship USS Juneau while both are underway. A replenishment oiler or replenishment tanker is a naval auxiliary ship with fuel tanks and dry cargo holds which can supply both fuel and dry stores during underway replenishment (UNREP) at sea.

6. API oil–water separator - Wikipedia

   en.wikipedia.org/wiki/API_oil–water_separator

   An API oil–water separator is a device designed to separate gross amounts of oil and suspended solids from industrial wastewater produced at oil refineries, petrochemical plants, chemical plants, natural gas processing plants and other industrial oily water sources.

7. Oil refinery - Wikipedia

   en.wikipedia.org/wiki/Oil_refinery

   An oil refinery or petroleum refinery is an industrial process plant where petroleum (crude oil) is transformed and refined into products such as gasoline (petrol), diesel fuel, asphalt base, fuel oils, heating oil, kerosene, liquefied petroleum gas and petroleum naphtha.