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。
Large pressure drops will lead to reduction of the gas load in downdraft gasifier, resulting in low temperature and tar production.
煤焦油是伦敦煤气道路照明几乎无限的副产物，利用便宜量大的煤焦油，染厂于1857年开始生产世界上第一种合成染色材料。
Utilising the cheap and plentiful coal tar that was an almost unlimited byproduct of London's gas street lighting, the dye works began producing the world's first synthetically dyed material in 1857.
利用现有焦油蒸馏设备，通过局部改造，实现了燃料油的生产。
The production of fuel oil is realized by the utilization of the existing tar distillation equipment and through partial modification.
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