煤类的划分一般是取样化验。
The division of coal species is based generally on the sampling and analysis.
残植煤类仅出现在初始世代和中期世代的早期阶段。
Liptobiolites occur only in the primary generation and in the early stage of the middle generation.
对于煤层结构复杂、变质程度较高的煤类，定性分类较为复杂。
As to the coal seams with complex texture and higher degree of metamorphism, the qualitative division of coal species is more complex.
直至前不久，它自夸到地热能不同于风能、太阳能等这些可再生能源，地热能是一类跟煤、天然气甚至是核能一样的一种为基本负荷供电的资源，但是它不会产生温室气体也不需要为辐射担心。
Until recently, it has boasted that, unlike other renewables, such as wind or solar, it is a base-load resource similar to coal, gas or even nuclear, but without greenhouse gases or radiation fears.
为了对煤与瓦斯突出事故进行有效的预防与控制，笔者应用灰色系统理论中的灰色聚类评估方法，对矿井的煤与瓦斯突出进行了预测。
Grey cluster assessment of the grey system theory is used to predict the outburst of coal and gas in mine so as to have effective prevention and control on this kind of accident.
深入研究煤低温热解过程中酚类的生成机理具有典型性和代表性，对促进煤化学研究具有重要的意义。
It is very important to promote the development on the field of coal chemistry by studing deeply on the mechanism of phenolic compounds produced during coal prolysis at lower temperature.
本文探讨了煤化度、煤岩组成、温度、加热速度、煤颗粒大小、停留时间、反应气氛和压力对煤转化过程中酚类产生的影响。
Effects of coal rank, coal maceral, temperature, heating rate, coal particle size, residence time, atmosphere, and pressure on the phenols production in coal conversion were discussed in this paper.
区内石炭—二叠纪煤系具有良好的煤型气及一定的煤层气潜力，中、下侏罗统和下白垩统暗色泥岩类是最具生油潜力的烃源岩系。
Permo Carboniferous coal series have relative good coal gas potential, dark mudstones in lower Jurassic, lower part of Middle Jurassic and lower Cretaceous are the best source rocks.
结果表明：焦炭中的破片、类丝炭来源于煤中的用性组分。
It is found that the inert of coke comes from inert macerals of coal.
基于理论分析建立了第三类边界条件下的煤粒瓦斯扩散方程，并给出了解析解。
The differential equations of coal particle gas diffusion under the third kind boundary condition and its analytical solution have obtained on the basis of theoretical analysis.
最后根据一回采工作面的基本条件，试算了两类煤巷的顶板离层临界值，并与实际观测数据进行了对比和分析。
Finally, a calculation example was showed, and the results indicated that the roof separation critical value of gob-side roadway is more than that of solid-coal roadway.
结果表明：灰色聚类方法评价煤的结渣性能时，其分辨力比用常规方法判别时高，判别结果更符合客观实际。
The results are compared with those by the commonly used single fac-tor judgement and with practical ones, It is concluded that the grey clustering method is better in terms of resolution.
我国煤炭资源丰富，共有5大煤系分布在两种构造体系控制的4类含煤盆地中。
The coal resources are very rich in China. There are 5 coal series distributing 4 kinds of coal bearing basin controlled by two structured systems.
实践证明煤污病是园林植物的一类重要病害。
Sooty blotch has become one of the most important diseases on many ornamental plants.
这三类孔同时也对应了瓦斯等气体在煤中的不同的运移状态。
According to the coal sample's pore fractal laws, the porosity of coal is divided into three categories: infiltration pore, diffusion pore and adsorption pore.
长壁留煤柱支撑法开采的关键技术是区分两类不同性质的煤柱，即区内煤柱和区域间的隔离煤柱。
The key technology of longwall remaining coal pillars support mining is to distinguish two kinds of coal pillars of different character between regional coal pillar and isolated coal pillar.
在年轻的，让本人们晓得，除了类语文，数学，还有更多有趣的尹体煤教学。
In the young, let us know the class in addition to language, mathematics, there are more interesting Yin Timei teaching.
在年轻的，让本人们晓得，除了类语文，数学，还有更多有趣的尹体煤教学。
In the young, let us know the class in addition to language, mathematics, there are more interesting Yin Timei teaching.
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