他们将汇报煤焦油的试验情况。
本文介绍了离心沉降法净化煤焦油的试验情况。
The experiment on purifying the coal tar by the centrifugal settling method is described in this paper.
泥煤焦油的性质和由木材干馏所得到的焦油的性质相似。
Peat tar has similar properties to the tar derived from the destructive distillation of wood .
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