1) difficult floated coal
难浮煤
1.
Research on accelerant for difficult floated coal of floatation;
难浮煤浮选促进剂的研究
2) the scarce difficult-to-float fine coal
稀缺难浮煤
3) easily-floated but hard-separated
易浮难分
1.
Based on the characteristic that the mineral is easily-floated but hard-separated and the mineral size is distributed overly differently,after eliminating the effect of copper ions by sodium sulfide,the copper,lead,zinc is floated by compounding depressant and compounding collector one by one.
针对某地含银铜铅锌多金属硫化矿易浮难分、嵌布粒度极不均匀的特点,采用优先浮选工艺流程,以硫化钠消除次生铜离子的影响,组合药剂浮选铜铅锌,铜铅粗精矿再磨显著提高铜铅锌分选效果,获得了较佳的分选指标,铜精矿含铜23。
5) difficult mining seam
难采煤层
1.
Longwall and longhole blasting coal mining method for difficult mining seam;
难采煤层巷道长壁长孔爆破采煤方法简介
6) fire resistant coal
难燃煤种
1.
This paper studies economy analysis index system of burning blended coal of fire resistant coal from Viet Nam and free-burning coal from Tashan of China or Indonesia on 600 MW super critical unit.
研究了600 MW超临界机组掺烧越南无烟煤等极难燃煤种和塔山煤、印尼煤等极易燃煤种的经济性分析指标体系,给出了一套较为简单的、适合现场评估的经济分析指标。
补充资料：难夫难妻(难ｎàｎ)
一名《洞房花烛》。故事片。亚细亚影戏公司1913年摄制。郑正秋编剧，张石川、郑正秋导演。一对素不相识的青年男女，经媒婆撮合拜堂成亲，在封建礼教桎梏下开始艰难的夫妻生活。为中国第一部故事片。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条