These comprise asphalt, tar and waxes.

其中包括沥青，焦油和蜡。

youdao

It is pointed out that to produce petro - asphalt and industrial naphthalene as main products and mixed methyl naphthalene fractions as by -product is one of important ways to utilize pyrolysis tar.

指出以生产石油沥青和工业萘为主，副产混合甲基萘等馏分，是综合利用裂解焦油的重要途径之一。

youdao

Asphalt, coal tar enamel, fusion-bonded epoxy, polyethylene tape, 2-layer PE and 3-layer PE coatings may be used for corrosion control of underground pipelines.

埋地钢管的外防腐可采用沥青防腐层、煤焦油瓷漆防腐层、聚乙烯胶粘带防腐层、熔结环氧粉末防腐层、二层结构聚乙烯防腐层、三层结构聚烯烃防腐层等技术。

youdao

Many years later, settlers used the tar,or asphalt, on the tops of their houses to keep water out.

VOA: special.2010.04.07