短語詞組短語fuxin coal -field 阜新煤田discharging coal dust field 平原型灰場Zhunnan coal -field 準(zhǔn)南煤田coal particles field 煤粉顆粒場pulverized coal concentration field 煤粉濃度場coal combustion field 煤燃燒領(lǐng)域Huainan coal -field 淮南煤田coal mining field 煤礦區(qū) 返回 coal field