| 31. | Within the preheating region, heat is again convectively transferred from the solid structure to the gas.
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| 32. | "The preheating of the flexi-cracker begins today, " a Lagoven spokesman said.
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| 33. | Place packages on a large baking sheet; let stand 15 minutes while preheating oven to 450 degrees.
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| 34. | The oven requires no preheating and can convert to a microwave oven with a touch of a button.
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| 35. | When cooking latkes, use a nonstick griddle that has been coated with nonstick cooking spray before preheating.
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| 36. | Preheating takes a little longer than usual, but once the desired temperature is reached the heat remains constant.
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| 37. | Preheating the feedwater reduces the irreversibilities involved in steam generation and therefore improves the thermodynamic efficiency of the system.
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| 38. | Systems can avoid frosting by modulating wheel speed, preheating the air, or stop / jogging the system.
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| 39. | Set an oven rack at the lowest level and place a baking stone or baking sheet on it before preheating.
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| 40. | For initial lighting, the vaporiser would be preheating by burning a little oil in a tray beneath the burner.
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