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Black charcoal one kind of filler in being rubber, the abrasion resistance being able to increase rubber waits , it is take tar oil as raw material in lower splitting decomposition of high temperature but able mainly.

1：炭黑是橡胶里的一种填充剂，可以增加橡胶的耐磨性等，它主要是以煤焦油为原料在高温下裂解而成的

Company engaged in chemical industry, coal tar products of the business.

公司从事化工，煤焦化产品的经营。

Coal tar processing industry as a precursor of modern organic chemistry, has been 100 years of history.

煤焦油加工作为近代有机化学工业的先导，至今已有100多年历史。

Our company ranks first in the output of coal tar.

我公司的煤黑油产量居全省之首。

They will report on the experiments with coal tar .

他们将汇报煤焦油的试验情况。

So it is expected that China's coal tar processing industry will see a severe competition in the next few years.

因此在未来几年，中国焦油加工行业会形成激烈竞争的局面。

The influence of the temperature, reaction time and air flow on the structure and properties of coal tar pitch was studied.

考察了反应温度、空气氧化时间、空气流量对沥青性质和结构的影响。

Coal tar creosote is the most widely used wood preservative in the United States.

煤焦油焦油是最广泛使用的木材防腐剂在美国。

The action mechanism of coal tar, coupling agent, resin and consolidating body was also discussed.

还讨论了煤焦油、偶联剂、树脂与粘结体之间的作用机理。

These findings provided some valuable information for further researches in coal tar hydro-upgrading process.

研究结果对煤焦油加氢改质工艺的深入研究提供了一定的理论基础和参考。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。