可取代的

The method can avoid the use of toxic substances of chloromethyl ether, etc. during the preparation process of methyl chloride polystyrene resin, and also improves the polysubstitution in chloromethylation reaction.

该方法既可避免在氯甲基聚苯乙烯树脂制备过程中使用氯甲醚之类的有毒物质，又改善了氯甲基化反应中的多取代。

Treated wastewater may replace fresh water as the replenisher.

处理后的水可用于取代补加新水，达到完全回用的目的。

The relationship of variation rate between the scan light beam length after passing through the deflector and the fast voltage pulse wasderived.

导出激光束通过偏转器后扫描光线长度与加到偏转器上的快速电压脉冲变化率关系，并在实验中分别用MOS管和雪崩管高压电脉冲发生器取代价格昂贵的冷阴极管高压电脉冲发生器，获得激光脉冲宽度压缩约两个量级，且实现激光脉冲宽度可调。

IR spectrum analysis shows that there are contain-oxygen functions and substitutive groups in coal macromolecular.

煤的红外光谱分析表明，煤中仍然存在含氧基团和一定数量的取代基，可得到芳氢率参数。

It is an ideal replacement for the 614 series electronic voltage stabilizer and magneticsaturating voltage stabilizer, also it can provide a quiet and reliable workingenvironment.

具有稳压精度高、过载能力强，可靠性好、抗干扰能力强、效率高，可长期连续工作，使用寿命长等优点，是取代614系列电子式稳压器和磁饱和稳压器的理想换代产品。它能提供一个安静无声、安全可靠的良好工作环境。

This door adopt double stall replace tradition foldout.The door can open 88 degree with no touch. The whole of the door move forth 3-4mm when close it,so it has perfect windtight performance.

门内安装JMLS-1型内置取代传统落后的合页固定门页工艺，门可开启880不要门碰，关门后整门向外平移3-4mm挤压，使该型机车入口门具有良好的密封性能。

In the presence of ethanol- HCl solution, arylamine-HCl and w=37% aqueous formaldehyde solution or the condensation product of arylamine and formaldehyde are directly reacted with ethyl 3-oxo-2-phenylmethylenebutyrate to form l-aryl-2-phenyl-3-carbethoxy-4-piperidone.

2－苯亚甲基－3－丁酮酸乙酯与芳香胺和w＝37％甲醛水溶液或芳胺和甲醛的缩合物在氯化氢－无水乙醇存在下可直接发生的Mannich反应，得到1－对位取代芳基－2－苯基－3－羰乙氧基－哌啶－4－酮。

Nowadays, in order to protect the ecological environment, the proportion of concrete used to construct drainage facilities should be reduced, and some non-major drainage facilities could be replaced with grassed channels.

近注重环境生态的保育，非主要排水设施以草沟取代，可低整体排水系统混凝土的使用，并於与自然环境结合。

Children's one-word utterances are also called holophrastic sentences, because they can be used to express a concept or predication that would be associated with an entire sentence in adult speech.

在儿童接近一岁或一岁初的某个时间，咿呀学语阶段逐步被语言最早的可辨识阶段所取代，此阶段通常被称为独词句阶段。

Heat treating technology development closely connected with three large scale technology andequipment importing is reviewed, and the fbatures of hcat treating specialization and large scale production areanalyzed. Main tcchnical progresses ofgas carbonitriding instead ofliquid cyaniding, improvement ofcontrol accuracyin gear carburizing, improvement of carburizing layer unitbrmity by preoxidation, increment of raw gas purity incontrolled atmosphere use of fbrging wastc heat cooling control for normalizing,...

回顾我国汽车工业热处理技术发展与3次大规模技术引进密切相关，分析了汽车工业热处理技术发展专业化，规模生产的特点，列举了10年来在气体碳氮共渗取代液体氰化；齿轮渗碳控制精度提高；采用预氧化工艺提高渗碳层均匀性；解决可控气氛中原料气纯度以及锻造余热控冷正火和等温正火技术的应用等方面嵢〉玫闹饕删停岢龈咝＝⑷却砩璞缸ㄒ档冉ㄒ椤

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。