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2. Cross-linked polyethylene - Wikipedia

   en.wikipedia.org/wiki/Cross-linked_polyethylene

   Tools and fittings used in a plumbing installation with PEX piping. (1) crimping tool to squeeze a metal band to join a pipe and a fitting (2) compression coupling joining two 1/2 inch pipes (copper or PEX) (3) "T-joint" to connect 3/4", 3/4", and 1/2" pipes (4) Copper-to-PEX 1/2" connection (requires soldering) (5 and 6) tools to undo PEX ...

3. Coupling (piping) - Wikipedia

   en.wikipedia.org/wiki/Coupling_(piping)

   Pipe coupling (copper sweat) In piping and plumbing , a coupling (or coupler ) is a very short length of pipe or tube , with a socket at one or both ends that allows two pipes or tubes to be joined, welded ( steel ), brazed or soldered ( copper , brass etc.) together.

4. Railway coupling conversion - Wikipedia

   en.wikipedia.org/wiki/Railway_coupling_conversion

   Conversion to the Janney coupling is now virtually complete. Commonwealth Railways started with Janney couplings on its 1,435 mm (4 ft 8 + 1 ⁄ 2 in) standard gauge Trans-Australian line, and some railways, like the former Victorian Railways and the Queensland Railways, used dual couplers. Older couplers remain on Heritage railways.

5. List of abbreviations in oil and gas exploration and production

   en.wikipedia.org/wiki/List_of_abbreviations_in...

   AIT – array induction tool; AL – appraisal license (United Kingdom), a type of onshore licence issued before 1996; ALAP – as low as possible (used along with density of mud) ALARP – as low as reasonably practicable; ALC – vertical seismic profile acoustic log calibration report; ALLMS – anchor leg load monitoring system

6. Sonogashira coupling - Wikipedia

   en.wikipedia.org/wiki/Sonogashira_coupling

   The coupling of 2-iodoprop-2-en-1-ol with a wide range of acetylenes. [52] The preparation of alk-2-ynylbuta-1,3-dienes from the cross-coupling of a diiodide and phenylacetylene, as shown below. [53] Synthesis of an alk-2-ynylbuta-1,3-diene accomplished by Sonogashira coupling. [53]

7. Schmidt coupling - Wikipedia

   en.wikipedia.org/wiki/Schmidt_coupling

   A Schmidt coupling is a type of coupling designed to accommodate large radial displacement between two shafts. Consisting of an arrangement of links and discs—three discs rotating in unison, interconnected in series by three or more links between each pair of discs—a Schmidt coupling can adapt to very wide variations in radial displacement while running under load.