| 21. | _Preheating the machine is essential.
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| 22. | These are converted during kiln feed preheating and become oxidized to form CO and CO 2.
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| 23. | I read somewhere that modern cars have complicated computer controlled systems that do not need preheating.
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| 24. | This engine provides preheating as well.
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| 25. | A preheating region exists prior to the surface of the flame front denoted by ? p.
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| 26. | The VCS mode is typically used for weakly exothermic reactions that require preheating prior to ignition.
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| 27. | While the waffle iron is preheating, separate the eggs and whisk the yolks into the batter.
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| 28. | The Accellis 2X range cooks in half the time of a traditional oven and requires no preheating.
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| 29. | Put one on middle shelf of the oven and check that temperature after preheating, she says.
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| 30. | Meanwhile, Sir Charles William Siemens had developed his regenerative preheating of fuel and air for combustion.
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