居民用煤炭制品是指煤球、煤饼、蜂窝煤和引火炭。
Coal products for residents refer to briquet, coal cake, honeycomb briquette and kindling charcoal.
煤的热解是指煤从固相变为气、固、液三相产物的过程。
Coal pyrolysis refers to coal from solid phase into the gas and solid, liquid three-phase product process.
可燃成分是指煤中的挥发分和固定碳，它们是产生热量的来源，而其中不可燃成分为灰分和水分等。
The combustible composition implies the volatile and fixed carbon, which is the source of generating heat. The incombustible part contains water and dust, etc.
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