名詞 coal gas:

1. gaseous mixture produced by distillation of bituminous coal and used for heating and lighting

1. A material such as wood, coal, gas, or oil burned to produce heat or power.
   燃燒劑木頭、煤、天然氣、石油等燃燒生熱并且產(chǎn)生能量的物質(zhì)
2. Ammonia, coal tar and coke are all by-products obtained in the manufacture of coal gas.
   氨氣、煤焦油、焦煤都是煤氣生產(chǎn)過程中的副產(chǎn)品。