coal-tar gas 煤焦油煤气
gas works coal tar 煤气焦油
producer gas coal tar 发生炉煤焦油
gas house coal tar 煤气焦油沥清
gas-producer coal tar 煤气发生炉焦油
producer-gas coal tar 发生灯煤沥青
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.
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。
Our known fossil fuel reserves are soaring. New finds of coal, natural gas, oil, tar sands, and oil shale keep growing, not declining.
已知的矿石燃料储备猛涨；不断有新的煤矿、天然气、石油、焦油砂和油页岩被发现；人口数量也在增长。
Calcium oxide in circulating ash is favorable to decrease the yield of tar and increase the yield of gas in partial coal gasification process with the circulating fluidized bed technology.
在以循环床锅炉循环灰为热载体、部分气化产生的半焦为锅炉燃料的煤的部分气化技术中，循环灰中的氧化钙对降低焦油产率、提高煤气产率是有利的。
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