查询词典 vacuum

When it's dark, in a vacuum, if a person shines a beam of light straight across your eyes, you won't see it.

当黑暗时，在真空中，如果有人将一束光直射进你的眼睛，你就看不见它。

If you ask a physicist how long it would take for a marble to fall from the top of a ten-story building, she will answer the question by assuming that the marble falls in a vacuum.

如果你问物理学家一个弹球从十层高的建筑物的顶部掉到地上所用的时间是多长，她的回答将会是假定弹球是在真空中下落的结果。

Three fractions of the biodiesel(230—260℃,230—310℃ and 260—310℃) were collected by vacuum distillation at an absolute pressure of 2000 Pa.

通过减压蒸馏，在0.002 MPa的压力下，分别收集230~260℃、230~310℃和260~310℃3个馏分段的生物柴油，测定其密度、黏度、冷凝点。

The plasma density scale length decided by main laser pulse in the experiment is suitable for Vacuum Heating, and it is the domiant process for hot electron generation. From the scaling law about hot electron temperature given by VH model, the hot electron measured by experiment was reasonable, the temperature was higher than the temperature given by Rcsonant Absorption scaling law.

从真空吸收给出的超热电子温度的定标率来看，实验中测量得到的超热电子温度是合理的。X射线是各向同性的，X射线产额随入射激光强度的降低而减小，当强度小于10〓W/cm〓时，不再有硬X射线产生。

Ultrafine cobalt powder ; glycol; 1、2-propanediol; reduction ; preparation process ; abstersion ; desiccation in vacuum

超细钴粉；乙二醇； 1、2丙二醇；还原；制备工艺；洗涤；真空干燥

Company has the biggest vacuum heat treatment furnace of our country, and do vacuum heat treatments for top grade product, in order to ensure all kinds of cutting tools have excellent capability.

公司拥有全国规模最大的真空热处理炉，对中高档产品采用了先进的真空热处理加工工艺，保证各类刀片都能得到优异的性能。

Vacuum Pump is a two stage pump capable of .1 micron can be used for applications such as freeze-drying, vacuum deposition, centrifuging, mass spectroscopy, electron microscopes and evacuation of cathode ray and other gas tubes.

L 真空泵是一种二级泵，它能处理1微米的压强，它能用于冷冻干燥、真空淀积、离心过滤、质谱分析、电子显微镜、抽真空阴极射线和其它的离子管的应用中。

This new refining process is termed "ladle-refining" or "secondary steelmaking". It is discussed in three parts: The development of various ladle-refining process including vacuum refining and normal pressure refining such as synthetic slag treatment, argon stirring, vacuum degassing VC, SLD,...

本文分三个方面进行讨论：(1)各种炉外精炼法的发展，包括真空精炼和常压精炼，例如合成渣洗、吹氩搅拌(Gazal、CAB、SAB法)、真空脱气(VC、SLD、TD、TD-VC、TD-SLD、RH、DH、FinKl和Gazid法)、带电弧加热的炉外精炼(ASEA-SKF、FinKl-VAD和LF法)、喷射冶金以及不锈钢的精炼法(AOD、CLU、VOD、SS-VOD、KVOD/VAD、RH-OB和VODC法)，(2)我国炉外精炼技术的现状，(3)发展炉外精炼必须注意的一些问题。

High vacuum (down to 0.067 kPa abs 0.01 psia) for vacuum distillation column and evaporator.

全球首家权威认证 SIL2 安全型变送器； 264， 268 系列已获船级认证。

Saddle shaped AMF can produce a radial expanding force, which has more effective effect on resisting the pinch effect of self-generated azimuthal magnetic field of arc current. This effect of saddle shaped AMF can keep vacuum arc in diffuse mode under much higher current. So the limiting current interruption capacity of vacuum interrupter can be enhanced.

为了进一步提高纵向磁场对真空电弧的控制作用，本文提出在真空灭弧室的触头间引入从触头中心向边缘逐渐增强的非均匀纵向磁场，马鞍形纵向磁场会对真空电弧产生一个径向扩张力，而纵向磁场分布的合理设计可以使这一扩张力进一步抑制真空电弧自生环向磁场对电弧的箍缩作用，从而使真空电弧在更大的电流时仍能保持在扩散态，使真空灭弧室的极限电流开断能力得以提高。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。