A marble-sized ball, originally of camphor but now of naphthalene, stored with clothes to repel moths.

The p dichlorobenzene and naphthalene in mothproofing agent was determined by infrared spectroscopy.

用红外光谱法测定了防蛀剂中对二氯苯和萘的含量.

The development condition and the problems in practice of Naphthalene series superplasticizer were also analysed.

分析了萘系高效减水剂的发展状况及应用中存在的问题.

For production of industrial naphthalene, the Coking Works of Anyang Iron & Steel Group Co.

安钢焦化厂工业萘生产系两炉两塔工艺流程,过程复杂,控制参数多,指标严格.

Dispersants such as lignin type, naphthalene sulfonate-formaldehyde condensates and polycarboxylic acids were introduced.

介绍了木质素类分散剂 、 萘磺酸甲醛缩合物和聚羧酸系分散剂.

The purity of refined naphthalene could be more than 99.5 % by said fractional crystallization process.

通过分级结晶提纯过程,可获得纯度达到99.5%以上的精萘产品.

Oil and Lubricants, Valves, Pipes and Pipe Fittings Naphthalene, Valves, Pipes Fittings Oil and Lubricants.

采购产品油和润滑物, 阀门, 管和管配件, 装阀门, 管配件,油和润滑物.

In fact, camphor and naphthalene balls are different in nature.

事实上, 樟脑和臭丸在性质上是不同的.

The polymer films of naphthalene , including naphthylamine , naphthalene and aminonaphthalenol, were obtained by electrochemical polymerization method.

以电化学方法得到一系列的萘衍生物聚合膜.

The gained achievements have a certain guiding significance for the industrial production of Naphthalene series superplasticizer.

所得成果对萘系高效减水剂的工业生产具有一定的指导意义.

The development of polyethylene naphthalate ( PEN ) and its intermediate 2,6-naphthalene dicarboxylic aicd ( 2,6-NDA ) is reviewed.

叙述了PEN及其中间体2, 6- 萘二甲酸的发展情况.

The amino acids were derivatized with naphthalene _ 2,3 _ dicarboxyaldehyde ( NDA ) to produce electroactive substances.

氨基酸用萘-2,3-二羧醛 ( NDA ) 衍生为电活性物质.

Several production methods, market demand and development of 2-naphthol are introduced in this paper.

本文着重介绍了 2- 萘酚的各种生产工艺及市场需求.

Alpha-naphthol test ( Molisch's test ) A test for detecting the presence of carbohydrates in solution.

α - 萘酚检测 ( 莫利施氏检验 ) :检测溶液中碳水化合物是否存在的试验.

The production of 2— naphthamine —6— sulfonic acid with 2— naphthol —6— sodlum sulfonate by Bucherer reaction is presented in this paper.

本文以2—萘酸—6—磺酸钠为原料通过布克尔反应(Buchererreaction)筛选出性能良好的催化剂.

This paper has described the synthetic methods and applications of methyl 1-naphthyl acetate.

概述了 1- 萘乙酸甲酯的国内外合成方法和应用情况.

Synthetic methods of methyl 1-naphthyl acetate were reviewed and its applications were introduced.

综述了 1- 萘乙酸甲酯的各种合成方法,并介绍了其应用.

Do not leave your napkin on the table.

不要把你的餐巾留在桌上.

The meal begins when the host opens his or her napkin.

主人打开餐巾即意味着开始进餐.

Ask him for a napkin. I dare you.

跟他要个餐巾, 我量你也不敢.

That's napkin, isn't it?

那是餐巾, 对 吗 ?