... 交替操作蒸馏釜 alternating still 焦油蒸馏釜 tar still 蒸馏釜预热器 still preheater ...
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煤焦沥青Coal tar:煤焦沥青是炼焦的副产品,即焦油蒸馏后残留在蒸馏釜内的黑色物质。
Coal tar is a by-product of coking, namely tar distillation residue in distillation kettle black material.
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