| 11. | :: : Generally superheating only occurs in liquids.
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| 12. | Superheating was applied in the 1920s, followed by piston valves shortly afterwards.
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| 13. | Both have since received extensive modifications including superheating.
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| 14. | This makes subcooling an easy and widespread source of heat for the superheating process.
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| 15. | When they were subsequently converted to superheating, they were reclassified to Class 14.
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| 16. | Shunting locomotives did not generally use superheating.
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| 17. | There is also the possibility of Superheating.
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| 18. | Mills developed a way of superheating the liquid soap, then spraying it to concentrate it.
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| 19. | Another important and very common application of subcooling is its indirect use on the superheating process.
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| 20. | In 1923 the North British Railway became part of the LNER, during the superheating programme.
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