coal grade的用法和樣例：
例句
- The methods of making solid coal sorbent and liquid gelsorbent from lignite are also discussed in this paper.
列舉了由褐煤制取固體煤質(zhì)吸附劑和液體凝膠吸附劑的方法。 - The paper introduces the requirement forcoal quality and the application of coal blending of the Texa-co pressure coal-water slurry.
簡(jiǎn)介了德士古水煤漿加壓氣化技術(shù)對煤質(zhì)的要求以及配煤在其中的應用。
