Factors affected coal seam permeability change and its law is analyzed.

Coal Mine, its coal seam is easily spontaneous fire.

大雁二矿煤种为褐煤, 属易自燃发火煤层.

The average UK coal seam is one metre thick.

英国煤层的平均厚度为1米。

They will report on the experiments with coal tar.

他们将汇报煤焦油的试验情况.

The structure change of medium coal tar pitch ( MCTP ) during co-carbonization was investigated by using NMR.

使用一种工业重质油和中温煤焦油沥青进行共 炭化 反应,改善了煤沥青的炭化性质.

Rich as it is in China, coal tar has not been effectively and rationally utilized.

我国煤焦油资源丰富, 但尚未得到有效和合理利用.

Our main products are coke, coal tar, coal gangue, crude benzene, gas, such as metallurgical coke.

公司主要产品为焦炭 、 煤焦油 、 煤矸石 、 粗苯 、 煤气 、 冶金焦等.

From something as vile as coal tar came a remarkably versatile substance.

从某种像煤渣那样污秽的东西中炼出了一种用途十分广泛的东西.

A colorless organic liquid, C 9 H 8 , obtained from coal tar and used in preparing synthetic resins.

'茚'.''一种无色的有机液体, c9h8, 从煤油中取得并用于配制人工合成树脂.

Several graphite samples were made from calcined coke and coal tar by hot pressing.

用煅烧石油焦和煤焦油为基本原料,采用热压工艺制备了几种石墨材料.

Methods of modified coal tar pitch for preparing high specific surface area activated carbon were studied.

研究了用于制备高比表面积活性炭的改质煤沥青的调制方法.

Coal tar has a strong smell and can stain clothing.

煤焦油有很强烈的气味,并且会染污衣服.

The behavior of pyrolysis condensation of coal-tar pitch during the thermal polymerization modification is described.

简要介绍改质沥青在炭素制品生产中的重要作用以及生产改质沥青的二种工艺.

Carbon foams were prepared from coal tar pitch, petroleum mesophase pitch, and AR pitch.

分别以煤沥青 、 石油中间相沥青和AR沥青为前驱体制备炭泡沫材料.

The process of coal tar steelmaking in special steel open hearth is described in this paper.

介绍了特钢平炉煤焦油炼钢工艺.

A pitch mesophase can be prepared from petroleum pitch and coal tar pitch.

从石油沥青和煤沥青中制取沥青中间相物质.

The results concluded that coal tar colors were not detected in fifty samples.

本调查系本局之比较检验,曾于八十七年三月三日发布新闻在案.

Some of the commonly specified coatings include epoxies, coal tar derivatives and sacrificial zinc primers.

通常采用的涂层包括:环氧树脂, 煤焦油衍生物和无锌底漆.

Our company ranks first in the output of coal tar.

我公司的煤黑油产量居全省之首.

The chemist reported on his experiments with coal tar.

化学家提出他实验沥青的报告.

Mesocarbon microbeads ( MCMB ) were prepared from coal tar pitch containing original QI by thermal condensation.

以含有原生QI的煤沥青为原料,采用热缩聚方法制备出中间相炭微球.