coalingn.装煤coaln.煤；木炭vt.烧成炭；供应煤vi.加煤；装煤coal refuses piles煤矸石山coal-pillar width煤柱宽度Coal tar distillate煤焦油馏出物coal handling plant输煤设备coal mine wasteland煤矿废弃地coal industry group煤业集团coal reserves seams煤储层coal listed company煤炭上市公司Coal feeding bunker受煤仓coal briquette bond型煤粘合剂

1. There is a general decrease in grain size upward.
   粒度一般是向上递减的。
2. The aggregate size determines the area.
   此面积的大小由骨料粒度决定。