查询词典 vacuum

On this basis, the prccesses of interrupting small inductive current by the vacuum interruptor were modelled in a computer program, and the effects of the circuit conditions on the vacuums ...

通过试验和模拟计算，获得了ZN—6/600真空开关有关截流、触头间隙击穿和电流高频过零熄弧的随机特性，分析了一些电路条件对真空开关开断感性小电流时的操作过电压的影响。

Interstice vacuum suction of bond head rotary work, save one second suction time and reduce the gas wastage.

间隙式真空吸附于压头组工作交替配合，节省了近1/2吸附时间且降低了气源损耗

The excessive β-ionone and the catalysts can be reused via vacuum distillation and filtration.

未反应的原料经减压蒸馏回收利用，催化剂经过滤分离、活化，其重复使用性良好。

Results show that 4-oxo-β-ionone is the major product with yield of 53.5% under the conditions as follows: reaction temperature 45℃, reaction time 24 h, the molar ratio of n: n(NaClO3): n 20: 100: 3, and pH value of solution in 1-3; on the other hand, 5,6-epoxy-β-ionone is major product with yield of 25.4% when reaction temperature is 40℃, reaction time is 24 h, the molar ratio of n: n(NaClO3): n is 20: 120: 5, and pH values of solution is 3. The excessive β-ionone can be recovered by vacuum distillation for reusing again. 4-oxo-β-ionone and 5,6-epoxy-3-ionone were purified by recrystallization and silica gel column chromatograph respectively with the purity over 98%.

研究结果表明：氯酸钠氧化β-紫罗兰酮的反应主要生成4-氧代－β-紫罗兰酮和5，6-环氧－β-紫罗兰酮，经重结晶和硅胶柱层析分离，纯度高于98%；4-氧代－β-紫罗兰酮的有利合成条件是反应温度为45℃，反应时间为24h，溶液的pH值为1~3，反应物配比n：n(NaClO3)：n为20：100：3，最佳收率为53.5%；5，6-环氧－β-紫罗兰酮有利的合成条件是反应温度为40℃，反应时间为24h，溶液的pH值为3，反应物配比n：n(NaClO3)：n为20：120：5，其收率为25.4%；未反应的β-紫罗兰酮经减压蒸馏回收后可重复使用。

The spin coating and vacuum evaporation methods were used to assemble porous silicon with Alq, irrespectively.

同时，由于复合结构中产生由多孔硅向MEH-PPV的能量转移，使得复合结构中MEH-PPV的发光峰红移。

In all these studies, the vacuum fluctuation on nucleon,Δ-isobar, and σ meson is considered.

在以上所有的分析中，考虑了核子、Δ粒子和σ介子的真空起伏。

Water vapor as a dynamic medium, the formation of a vacuum jet pump is an important field.

用水蒸汽作为动力介质的喷射泵形成真空是一个重要应用领域。

Jet pump for generating vacuum is another very important application.

喷射泵用于产生真空是另一个非常重要的应用。

This text introduces the structure and function character of gas-water cascade jet vacuum pump group.

本文介绍了汽水串联喷射真空泵机组的结构及性能特点，在化工生产中的应用，同时与两级水环真空泵和蒸汽喷射泵进行了对比。

The scientists then added a jolting statement:"At present, there is a vacuum of information, and elasmobranches can easily drop to extinction without notice."

然后，科学家将一个颠簸声明："目前，有一个信息真空，elasmobranches可以很容易下降到灭绝，恕不另行通知。"

Now she was hungry and angry.She began to smoulder.

现在她又饿又气，她开始流露难以抑制的怒火。

You have placed our iniquities before You, Our secret sins in the light of Your presence.

诗90：8 你将我们的罪孽摆在你面前、将我们的隐恶摆在你面光之中。