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Its value is in its ability to act as a guard from road hazards such as bugs, chemicals such as tar and gravel on roadways and from pitting damage on your automobile's grill and paint surfaces.

它的价值是它有能力充当警卫从公路灾害等昆虫诸如化学、焦油及沙石公路从汽车蚀损坏你的油烟和油漆表面。

The average structural parameters of the coal-tar-pitch ,solvent oil and modified road binder were calculated by Brown-Lander formula using NMR, ultimate analysis and average molecular weight.

利用核磁共振、元素分析、分子量测定等手段，计算得到了煤沥青、溶剂油以及改质筑路油等的平均结构参数。

In recent years, the province has been quickening the elimination of out-of-date production capacity, actively developing large coking enterprises, and promoting the recovery of coke tar.

近年来，山西省加快淘汰落后生产能力，积极发展大机焦，推进化产品回收，大机焦比重已达到83%，焦油回收率达到90%以上，产业整体素质得到进一步提升。

Some so-called natural vitamin may be made of dead beef liver, coal tar or petro-chemicals? And some so-called natural minerals are made of mined ore powder, calcium from ground up oyster shells.

一些所谓天然的维他命可能是从死牛肝、煤焦或石油化合物炼制而成的，而一些所谓全天然的矿物质只不过是矿石的粉末，钙则是蚝壳的粉末，人体绝不容易去吸收这些所谓的「天然物质」！

The premier has antagonised the oil and gas industry, first with a bungled attempt to raise royalties and then by his lacklustre defence of the province's tar sands from attacks on their carbon emissions by greens at home and abroad.

总理早已对石油业和天然气业表示反感，起先是为了提高特许权使用费，后来是为了把省里的沥青砂拿来反对国内外的绿林党的进攻。

In the world of American folk tales, almost anything can happen: A cowboy rides a tornado without a saddle . A huge lumberjack digs the Great Lakes to give his giant blue ox drinking water. A rabbit's big mouth gets him stuck in a bunch of tar .

在美国民间传说的世界中，几乎任何事都可能发生：一位牛仔可以不用马鞍而骑在龙卷风上；一个身材宏伟的伐木工人挖了「大湖」，好给他蓝色的巨牛喝水；或是一只兔子因为爱说话而被卡在焦油里。

NORTH STAR TRIPLE THREAT: The North Star is not a single star, but rather a triple tar system consisting of Polaris and two companions.

北极星并非一个孤单的星星，而是一个三星系统，还包含着两个伴星。

So as to lower the cost of transp ortation and tar iffs. As such, the Group is

一部分，减少自国外进口的数量，也减少运输和关税

By studying TG curve, DTG curve and DTA curve recorded by the computer, nature of the evaporation and combustion of biomass tar and its distillations is analyzed and parameters of their thermal kinetics are computed.

生物质焦油150℃以下上层馏分和150℃～210℃馏分含有多种有用的有机化合物，部分化合物的含量较明显，经济价值很高，具有一定的分离提纯价值。

By studying the chemical composition and the thermal kinetics characteristics of biomass tar and its distillations, related reference material can be offered to research the use of biomass in energy and chemical industry.

生物质焦油存在高水分、高含氧量、高挥发量、中热值、水分挥发后达到一定温度可以着火燃烧、燃烧后剩余灰分较少的低硫燃料。

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。