| 1. | The heating surface presented to the action of the furnaces was.
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| 2. | Hot plates with two heating surfaces are used to fuse plastic pipes.
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| 3. | Forced circulation occurs when hydrostatic head prevents boiling at the heating surface.
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| 4. | The copper firebox had grate area of and a heating surface of.
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| 5. | The lowest drum of the three provided the heating surface.
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| 6. | They heated five single-ended boilers with a combined heating surface of.
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| 7. | The main heating surface is provided by water-tubes in this squared section.
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| 8. | Operating at, her three boilers had a grate area of and heating surface of.
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| 9. | Calcium sulfate is a common precipitation foulant of heating surfaces due to its retrograde solubility.
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| 10. | The maximum temperature of the heating surface can vary from depending on the room type.
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