Large pressure drops will lead to reduction of the gas load in downdraft gasifier, resulting in low temperature and tar production.

大型压力下降将导致在吸式气化炉燃气负荷减少，低温焦油生产造成的。

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H. E. A. T. tank heaters are designed to heat any fluid with maximum efficiency in a variety of industries, including: food, pulp and paper, chemical processing and coal tar production.

我们公司生产的罐加热器，可加热任何液体，应用于各种工业领域，包括：食品，纸浆，化工和煤焦油领域。

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When the coal tar processing system would be constructed, the production capacity, process and products proposal should be emphasized.

指出在建设焦油加工装置时，应重点考虑生产规模、工艺流程和产品方案。

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Production of oil from tar sands bitumen produces between three and five times the greenhouse gas pollution of conventional oil production.

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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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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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