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mechanical engineering thermodynamics
1. Coke is produced
(A): by heating wood with a limited supply of air to a temperature not less than 280°C
(B): from the finely ground coal by moulding under pressure with or without a binding material
(C): when coal is first dried and then crushed to a fine powder by pulverising machine
(D): when coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel
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