这些物质具有毒性，由于这些成分的含量不同，煤焦沥青的性质也因而不同。
These substances have toxic, because the content of these compounds is different, the properties of coal tar are so different.
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 .
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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