petroleum tar

常见例句

The separation and purification processes of 2,6-DMN from coal and petroleum tar are reviewed.
綜述了從煤焦油和石油中分離提純2，6-二甲基萘工藝。
Natural mineral compounds consist of carbon , hydrogen, sulphur and nitrogen or the residue from distillation of petroleum, coal tar or rosin.
瀝青天然産生的瀝青是含有碳、氫、硫和氮的鑛産化郃物。人造瀝青是蒸霤石油，煤焦油或松脂後的餘下渣滓。
The utilization and the prepartion methods of 2,6-DMN are introduced. The separation and purification processes of 2,6-DMN from coal and petroleum tar are reviewed.
本文介紹了2 ，6 -二甲基萘的用途和制備方法；綜述了從煤焦油和石油中分離提純2 ，6 -二甲基萘工藝。

And even the black goo used by the ancient Romans to lubricate their chariot axels was a petroleum-based form of natural tar.
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And Canada is still fighting for an exemption from a rule inserted into the 2007 Energy Independence and Security Act that bars the American government from buying fuels whose production causes more greenhouse-gas emissions than conventional petroleum sources, as producing oil from tar sands does.
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Given the extent to which sand, tar or murderous thugs get in the way of petroleum production, it's no surprise that Shell's engineers see salvation in natural gas.
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