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Low-boiling phenols in low-temperature coal tar are important chemical raw materials. For the identification and determination of the individual phenol boiling below 210℃ in the low temperature coal tar, the methods of gas chromatography, liquid-liquid chromatography followed by ultra-violet analysis and fractional distillation followed by infrared analysis were evaluated and compared.

随着煤炼油工业的发展，煤焦油中的酚类，特别是低級酚，作为化工原料的利用很重要，我們应用(1)气液色譜法，(2)液液色譜与紫外光譜法結合及(3)精餾与紅外光譜法結合三种不同方法对210°以前的低級酚进行了各种异构体的成分分析，比較分析結果：三种方法对同一样品进行分析时，最大絕对誤差在2％以内，其中以气液色譜法最为快速，液液色譜法次之，精餾-紅外光譜法費时間較多；但后二种方法所得数据較完全。

In this paper, density and viscosity of coal tar oil and hydrogen solubility in coal tar oil is studied fairly systematically, and is carried on the fitting analysis with Excel software.

本文较为系统地研究了煤焦油的密度、粘度和氢气在煤焦油中的溶解度等基础物性，并用Excel软件进行了拟合分析。

Using a new patented technology to effectively solve the problems of gas purification; use of special bacteria and aerobic, anaerobic method of combining wastewater treatment tar to achieve gasification power generation system of tar waste water recycling

2采用新型专利技术，有效解决了燃气净化中的难题；采用特种菌种和好氧、厌氧相结合的方法处理焦油污水，实现气化发电系统中焦油污水循环利用

The wet grinding process suitable for coal tar pitch particles must be investigated to prepare the coal tar pitch water slurry as a new clean fuel.

为制备煤沥青水浆清洁燃料，必须研究适合于煤沥青颗粒的湿法磨矿工艺。

Some oil fields have a mat of heavy tar at the oil water contact. This mat is produced by the degradation of oil as bottom waters move beneath the oil-water contact.Tar mats cause considerable production problems by inhibiting water from displacing oil.

由于油水界面下面底水的流动造成了原油的降减作用，一些油田的油水界面处常形成一种重油垫，由于重油垫阻止了水对油的替换作用，因而造成了许多严重的生产问题。

Some oil fields have amat of heavy tar at the oil water contact.This mat is produced by the degradation of oil as bottom waters move beneath the oil-water contact.Tar mats cause considerable production problems by inhibiting water from displacing oil.

由于油水界面下面底水的流动造成了原油的降减作用，一些油田的油水界面处常形成一种重油垫，由于重油垫阻止了水对油的替换作用，因而造成了许多严重的生产问题。

Some oil fields have a mat of heavy tar at the oil water contact. This mat is produced by the degradation of oil as bottom waters move beneath the oil-water contact.Tar mats cause considerable production problems by inhibit ing water from displacing oil.

由于油水界面下面底水的流动造成了原油的降减作用，一些油田的油水界面处常形成一种重油垫，由于重油垫阻止了水对油的替换作用，因而造成了许多严重的生产问题。

Study on treatment of coal tar waste water by chlorine dioxide;2. Determination of naphthalene in coal tar by capillary pillar gas chromatography

白色易挥发晶体，有温和芳香气味，粗萘有煤焦油臭味；蒸汽压 0.13kPa/52.6℃闪点：80℃；熔点 80.1℃沸点217.9℃；不溶于水，溶于无水乙醇、醚、苯，相对密度(水=1)1.16；相对密度(空气=1)4.42；稳定性：稳定；危险标记：8；主要用途：用于制造染料中间体、樟脑丸、皮革、木材保护剂等

The research coal tar surface active position spot is studies the coal tar and the methane action mechanism foundation.

研究煤焦表面的活性位点是研究煤焦与甲烷作用机理的基础。

Tar - This drops a pool of Tar on the ground that can be set on fire.

焦油：洩出一滩可以被点燃的焦油，降低踩中焦油的敌人的移动速度。

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。