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coal carbonization
busin. 焦化; 煤焦化
chem. 煤的干馏; 煤的碳化作用
el. 煤的干憎; 煤的焦化
oil 煤碳化作用
tech. 煤炭化; 煤干馏
coal carbonization: 7 phrases in 3 subjects
Chemistry1
Ecology1
Technology5