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- medium hard coal 中等硬度煤
- Soft coal burns with more flames than hard coal. 烟煤燃烧时火焰较无烟煤多。
- Double-ray roller reaker i mainly used i crushing medium hard material like ore, coal, coke, lag etc. it i mainly a licable to mineral, electrical ower lant, coal, co truction, chemical lant etc. 双光辊破碎机主要用来破碎矿石，煤，焦碳，炉渣等中硬度物料，广泛应用于矿山，电力，煤炭，建筑，化工等行业。
- Suitable for coring in medium hard formation with abrasiveness. Core recovery rate is high. 适用于带研磨性的中硬地层取芯，取芯收获率高。
- Specialized PDC cutters extends bit life in soft formation with medium hard and abrasive layers. 新型复合片及布齿可提高钻头在含中等硬度和研磨性夹层的软地层中的使用寿命.
- Finally great depth of burial, long time and higher temperature may metamorphose the lignite into soft coal or bituminous coal and in extreme cases, to hard coal or anthracite. 褐煤经长时间进一步的深埋以及较高的温度的作用，便可变成软煤或烟煤，再进一步变化，便成了硬煤或无烟煤。
- Medium hard type, good colour dispersing, good surface glossy，nonstick surface, good properties of anti-swelling. 特性及用途Characteristics and Applications: 中硬质，展色性佳，滑爽度佳，耐膨润性佳，表皮成膜不粘连。
- Applicable to sticky soft formation with medium hard and abrasive interbedded layers. 可钻中等硬度带研磨性夹层的粘软地层.
- In this paper, the basic physical and themical properties of the pulverized bituminous and hard coal used in XISCO (Xiangtan Iron and Steel Company)B. 作者测定了湘钢高炉喷吹用烟煤与无烟煤粉的基本物理化学性能,进行了烟煤与无烟煤混合喷吹的试验研究;
- The combustion characteristics of a hard coal, two kinds of biomass and their blends were investigated by thermogravimetric analysis. 本文通过热分析技术,对无烟煤、玉米秸杆与废弃加工木屑两种生物质及其混合物的燃烧特性进行了实验研究。
- Pine is medium hard, whitish to yellowish in colour, long-figred, tough with a plain grain pattern. It is suitable for masts, yards and planking. 松木是中等硬度，颜色白至浅黄，坚韧，长纤维带清晰纹理图案。它适用于桅杆、帆桁和船壳板。
- Thisseries of bit is suitable for drilling medium hard to hard formations with high compressive strength and medium abrasiveness. 适合在中硬至硬的高抗压强、中等研磨性的地层中使用。
- Medium parabolic profile and heavy cutter density provides high ROP in medium hard formation with medium compressive strength and small interbedded layers. 中等抛物线冠部和较密布齿使其在中等抗压强度的中硬地层以及薄夹层中能有良好的钻井速度.
- Sublevel caving technique has been utilized in Datong mining area under hard rock and hard coal, problems including low recovery ratio and spontaneous fire in gob have been overcome to achieve safe and high prodction. 大同煤矿集团“两硬”条件侏罗纪厚煤层下分层工作面应用低位放顶煤开采技术,解决了传统工艺所造成的煤炭资源回收率低、空区自然发火危险程度高等技术难题,实现了安全高效开采的目的。
- KQC series of air hammers used in gas drilling can solve certain problems,such as lower ROP(Rate of Penetration) and well deviation,which occurred in mud drilling in above medium hard formation. 在油田气体钻井中使用KQC系列空气锤,解决了泥浆钻井在中硬以上地层中钻速慢、易井斜的难题。
- It is hard to sleep without a cooler in this room. 没有空气调节器，在这间屋里很难入睡。
- New (medium hard) Emerald laminated cue tips are made with recycled pig leather splits and laminated with water based custom-made adhesives to get the maximum strength for lamination. 新（中硬）复合线索提示是作出回收猪皮革的分裂以及与水夹层的定制粘合剂以获得最大强度为层压翡翠。
- The compressibility of vuggy rocks with medium hardness is usually small and can be neglected in the calculations of reservoir engineering. 计算结果还表明,中等硬度的岩石溶洞的压缩系数都很小,油藏工程计算中可将其忽略。
- With the rock breaking test,the pick shape inserted tooth rolling cuter has obtained a rock breaking result and is suitable to be applied to the drilling in the hard rock and medium hard rock. 通过破岩试验,镐形镶齿滚刀有较好的破岩效果,适合于在硬岩及中硬岩层中推广应用。
- English is not the usual medium of instruction in our school. 英语不是我校通常使用的教学语言。
