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Thermodynamics - Data Intensity 3 :: Discussion
| 3. | Coke is produced | |
| A. | when coal is first dried and then crushed to a fine powder by pulverising machine | |
| B. | from the finely ground coal by moulding under pressure with or without a binding material | |
| C. | when coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel | |
| D. | by heating wood with a limited supply of air to a temperature not less than 280�C | |
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