1·The pit cover should be sealed over with tar paper or plastic.
顶盖必须用焦油纸或塑料封闭。
2·The paper analyzes the problem in separating oil tar by the mechanize trough. It raises the concrete transform plan, which gains the well economic efficiency in reality.
分析了机械化澄清槽分离焦油过程中存在的难题，提出了具体的改造方案，并且在实际中取得较好的经济效益。
3·This paper proposed to use coal tar and other processed products instead of partial heavy oil for float glass plants and analyzed related market supply, economic and technical feasibility.
主要提出了浮法玻璃工厂使用煤焦油及其深加工产品替代部分重油的可行性，分析了有关的市场情况、经济性和技术可行性。
4·This paper gave an example of anatomy and study of unknown compound in black tar.
本文列举了黑色焦油中未知物的剖析研究实例。
5·This paper described the preparations for substituting heavy oil by coal tar. It pointed out the problems from coal tar and advanced the reasons and the measures.
介绍了重油替代煤焦油的准备工作，煤焦油在使用中出现的问题以及原因分析和解决途径。
6·The kinetics of mesophase formation from two sorts of coal tar pitch with different primary QI content is studied in this paper. The kinetic parameters are determined.
本文研究了两种原生qi含量不同的煤焦油沥青中间相形成动力学，测得了中间相形成动力学参数。
7·The main objective of this paper is study on catalytic removal of tar.
本论文以生物质焦油的催化脱除为研究目的。
8·The acidic coal tar from rude benzene refining is always the problem of the coking factory, this paper summed up whose comprehensive utilization in new method and new process.
粗苯精制工艺产生的酸焦油，一直是困扰焦化厂的问题，综述了其综合利用的新方法、新工艺。
9·The commercial trial verified that the cigarette paper made of poplar pulp can be substituted for the imported product, and the demand of reducing the tar can be realized.
使用试验证明，这种高透气度卷烟纸可以取代进口纸，实现卷烟降焦的要求。
10·The experiment on purifying the coal tar by the centrifugal settling method is described in this paper.
本文介绍了离心沉降法净化煤焦油的试验情况。