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

1、

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.

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2、

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.

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3、

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.

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4、

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.

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5、

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.

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6、

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.

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7、

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.

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8、

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.

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9、

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.

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10、

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.

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11、

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.

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12、

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.

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13、

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.

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14、

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.

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15、

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.

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16、

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.

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17、

Do not leave your napkin on the table.

不要把你的餐巾留在桌上.

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18、

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.

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19、

Ask him for a napkin. I dare you.

跟他要个餐巾, 我量你也不敢.

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20、

That's napkin, isn't it?

那是餐巾, 对吗 ?

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